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Padiadpu J, Garcia‐Jaramillo M, Newman NK, Pederson JW, Rodrigues R, Li Z, Singh S, Monnier P, Trinchieri G, Brown K, Dzutsev AK, Shulzhenko N, Jump DB, Morgun A. Multi-omic network analysis identified betacellulin as a novel target of omega-3 fatty acid attenuation of western diet-induced nonalcoholic steatohepatitis. EMBO Mol Med 2023; 15:e18367. [PMID: 37859621 PMCID: PMC10630881 DOI: 10.15252/emmm.202318367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 09/19/2023] [Accepted: 09/21/2023] [Indexed: 10/21/2023] Open
Abstract
Clinical and preclinical studies established that supplementing diets with ω3 polyunsaturated fatty acids (PUFA) can reduce hepatic dysfunction in nonalcoholic steatohepatitis (NASH) but molecular underpinnings of this action were elusive. Herein, we used multi-omic network analysis that unveiled critical molecular pathways involved in ω3 PUFA effects in a preclinical mouse model of western diet induced NASH. Since NASH is a precursor of liver cancer, we also performed meta-analysis of human liver cancer transcriptomes that uncovered betacellulin as a key EGFR-binding protein upregulated in liver cancer and downregulated by ω3 PUFAs in animals and humans with NASH. We then confirmed that betacellulin acts by promoting proliferation of quiescent hepatic stellate cells, inducing transforming growth factor-β2 and increasing collagen production. When used in combination with TLR2/4 agonists, betacellulin upregulated integrins in macrophages thereby potentiating inflammation and fibrosis. Taken together, our results suggest that suppression of betacellulin is one of the key mechanisms associated with anti-inflammatory and anti-fibrotic effects of ω3 PUFA on NASH.
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Affiliation(s)
| | | | - Nolan K Newman
- College of PharmacyOregon State UniversityCorvallisORUSA
| | - Jacob W Pederson
- Carlson College of Veterinary MedicineOregon State UniversityCorvallisORUSA
| | - Richard Rodrigues
- College of PharmacyOregon State UniversityCorvallisORUSA
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer InstituteNational Institutes of HealthBethesdaMDUSA
| | - Zhipeng Li
- Carlson College of Veterinary MedicineOregon State UniversityCorvallisORUSA
| | - Sehajvir Singh
- College of PharmacyOregon State UniversityCorvallisORUSA
| | - Philip Monnier
- College of PharmacyOregon State UniversityCorvallisORUSA
| | - Giorgio Trinchieri
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer InstituteNational Institutes of HealthBethesdaMDUSA
| | - Kevin Brown
- College of PharmacyOregon State UniversityCorvallisORUSA
- School of Chemical, Biological, and Environmental EngineeringOregon State UniversityCorvallisORUSA
| | - Amiran K Dzutsev
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer InstituteNational Institutes of HealthBethesdaMDUSA
| | - Natalia Shulzhenko
- Carlson College of Veterinary MedicineOregon State UniversityCorvallisORUSA
| | - Donald B Jump
- Nutrition Program, School of Biological and Population Health Sciences, Linus Pauling InstituteOregon State UniversityCorvallisORUSA
| | - Andrey Morgun
- College of PharmacyOregon State UniversityCorvallisORUSA
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Chaudon MJ, Hulea O, Yakoub A, Monnier P, Saadaoui M. Wearable device for iontophoretic treatment and monitoring of pressure ulcers: Proof-of-concept. Med Eng Phys 2022; 107:103861. [DOI: 10.1016/j.medengphy.2022.103861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 03/06/2022] [Accepted: 07/26/2022] [Indexed: 11/29/2022]
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Creux H, Monnier P, Son W, Tulandi T, Buckett W. In vitro maturation oocyte collection at different phases of the menstrual cycle among women requiring urgent chemotherapy. Fertil Steril 2016. [DOI: 10.1016/j.fertnstert.2016.07.098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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de Trey LA, Lambercy K, Monnier P, Sandu K. Management of severe congenital laryngeal webs - a 12 year review. Int J Pediatr Otorhinolaryngol 2016; 86:82-6. [PMID: 27260586 DOI: 10.1016/j.ijporl.2016.04.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Revised: 04/03/2016] [Accepted: 04/04/2016] [Indexed: 11/26/2022]
Abstract
OBJECTIVE The aim of this study was to investigate respiratory and voice outcomes after open surgery for severe congenital laryngeal web. METHODS Included were all patients treated for severe congenital glottic web (Cohen type 3 and 4) between 2002 and 2014. Demographic data, symptoms, endoscopic findings, type of operation, outcome and complications were analyzed. Open surgery was performed with division of the web and enlargement of the subglottis by a laryngotracheal reconstruction or an extended partial cricotracheal resection. RESULTS Fourteen patients were included. Information on the pre-operative voice was available in 11 patients. Aphonia was present in 6 patients (55%), dysphonia was severe in 1 (9%), moderate in 2 (18%) and mild in 2 (18%). Median age at operation was 19.3 months. As a first line treatment, laryngotracheal reconstruction was performed in 12 patients, and an extended partial cricotracheal resection in 2. Median follow-up was 9.5 months. All patients were successfully decannulated in a median time of 4 months after first surgery. Voice was improved in 10/11 (91%). Post-operatively, 3 patients (27%) had good voice. Dysphonia was severe in 2 (18%), moderate in 3 (27%) and mild in 3 patients (27%). CONCLUSION Open surgery for Cohen type 3 and 4 glottic web allowed establishing a patent airway with successful decannulation in all cases. Quality of voice was improved in 91%, however, voice results were variable. In our opinion a delicate operative technique described in the paper is important for optimal voice results.
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Affiliation(s)
- L A de Trey
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital (CHUV), Lausanne, Switzerland; Department of Otorhinolaryngology, Children's University Hospital Zurich, Switzerland.
| | - K Lambercy
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital (CHUV), Lausanne, Switzerland
| | - P Monnier
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital (CHUV), Lausanne, Switzerland
| | - K Sandu
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital (CHUV), Lausanne, Switzerland
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Vélez MP, Arbuckle TE, Monnier P, Fraser WD. Female digit length ratio (2D:4D) and time-to-pregnancy. Hum Reprod 2016; 31:2128-34. [PMID: 27343270 DOI: 10.1093/humrep/dew164] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Accepted: 06/03/2016] [Indexed: 11/14/2022] Open
Abstract
STUDY QUESTION Is the female 2th- to 4th-finger ratio (2D:4D) associated with fecundity as measured by time-to-pregnancy (TTP)? SUMMARY ANSWER Our study does not support an association between female 2D:4D and TTP. WHAT IS KNOWN ALREADY The 2th- to 4th-finger ratio (2D:4D) has been proposed as a potential indicator of greater androgen exposure during fetal development. Women exposed in utero to unbalanced steroid hormones may have impaired fecundity in the adulthood. Fecundity is often measured by TTP, an epidemiological tool commonly used to assess the impact of environmental factors in human conception. STUDY DESIGN, SIZE, DURATION The Maternal-Infant Research on Environmental Chemicals (MIREC) Study is a pregnancy and birth cohort of 2001 women recruited before 14 weeks of gestation in 10 cities across Canada between 2008 and 2011. The present analysis is part of MIREC-CD Plus, a follow-up study in a subsample of some 800 MIREC mothers and their children from 2012 to 2015. PARTICIPANTS/MATERIALS, SETTING, METHODS TTP and maternal characteristics were collected from questionnaires administered during the first trimester of pregnancy as part of the MIREC study. Digital pictures of the ventral surface of both hands were obtained in the MIREC mothers at the MIREC-CD Plus follow-up study. The 2D:4D was calculated as the ratio of the second and fourth fingers of each hand. The exposure of interest was the 2D:4D of the women categorized by tertiles, or dichotomized as ≥1 (index finger longer than the ring finger) or <1 (ring finger longer than the index finger, implying greater androgen exposure during fetal development). The final sample included 696 mothers. Statistical analyses included discrete-time Cox proportional hazard models, allowing adjustment for potential confounding factors. MAIN RESULTS AND THE ROLE OF CHANCE There was no evidence of diminished/increased fecundability according to the 2D:4D, neither on the right nor on the left hand. In our analysis by tertiles, the smallest 2D:4D (i.e. higher androgen exposure during fetal life) resulted in FORs higher than 1 (i.e. shorter TTP) in both hands, although this was not statistically significant (FOR 1.19 [95% CI 0.93, 1.51] in the right hand and 1.16 [95% CI 0.91, 1.47] in the left hand). In the dichotomous analysis, 2D:4D <1 resulted in FORs higher than 1 (i.e. shorter TTP), but this was also not statistically significant (FOR 1.08 [95% CI 0.88, 1.33] in the right hand and 1.14 [95% CI 0.92, 1.42] in the left hand). Our large sample size resulted in a high statistical power to exclude an association between female 2D:4D and TTP. LIMITATIONS, REASONS FOR CAUTION The MIREC Study is a cohort of pregnant women, and therefore, women with infertility were excluded by design from our study. WIDER IMPLICATIONS OF THE FINDINGS Our data do not provide evidence for an association between female 2D:4D and fecundity as measured by TTP. Whether the female 2D:4D is a marker of in utero androgen exposure and whether it is associated with fecundity have yet to be determined. STUDY FUNDING/COMPETING INTEREST The MIREC Study was funded by Health Canada's Chemicals Management Plan, the Canadian Institute of Health Research (CIHR grant # MOP - 81285), and the Ontario Ministry of the Environment. MIREC-CD Plus was funded by Health Canada's Chemicals Management Plan Research Fund. The 2D:4D component was funded by a research grant from the CIHR-Quebec Training Network in Perinatal Research (QTNPR). M.P. Vélez was supported by a CIHR Fellowship Award, and a QTNPR scholarship. P. Monnier is supported by the Research Institute of the McGill University Health Centre. W.D Fraser is supported by a CIHR Canada Research Chair. There are no conflicts of interest to declare.
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Affiliation(s)
- M P Vélez
- Department of Obstetrics and Gynecology, Kingston General Hospital, Queen's University, Kingston, Canada
| | - T E Arbuckle
- Population Studies Division, Healthy Environments and Consumer Safety Branch, Health Canada, Ottawa, Canada
| | - P Monnier
- Department of Obstetrics and Gynecology, McGill University Health Centre, Montreal, Canada
| | - W D Fraser
- Sainte-Justine University Hospital Research Centre, University of Montreal, Montreal, Canada Department of Obstetrics and Gynecology, University of Sherbrooke, Sherbrooke, Quebec, Canada
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Fitsios D, Alexoudi T, Bazin A, Monnier P, Raj R, Miliou A, Kanellos GT, Pleros N, Raineri F. Ultra-compact III‒V-on-Si photonic crystal memory for flip-flop operation at 5 Gb/s. Opt Express 2016; 24:4270-7. [PMID: 26907074 DOI: 10.1364/oe.24.004270] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We report on a photonic crystal (PhC) nanolaser based on the heterogeneous integration of a III-V PhC nanocavity on SOI, configured to operate as a Set-Reset Flip-Flop (SR-FF). The active layer is a nanobeam cavity made of a 650 nm × 285 nm InP-based wire waveguide evanescently coupled to 500 nm × 220 nm SOI wire waveguides, demonstrating a record-low footprint of only 6.2 μm2. Injection locking enables optical bistability allowing for memory operation with only 6.4 fJ/bit switching energies and <50 ps response times. Bit-level SR-FF memory operation was evaluated at 5 Gb/s with PRBS-resembling data patterns, revealing error free operation with a negative power penalty.
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Shapiro GD, Dodds L, Arbuckle TE, Ashley-Martin J, Fraser W, Fisher M, Taback S, Keely E, Bouchard MF, Monnier P, Dallaire R, Morisset A, Ettinger AS. Exposure to phthalates, bisphenol A and metals in pregnancy and the association with impaired glucose tolerance and gestational diabetes mellitus: The MIREC study. Environ Int 2015; 83:63-71. [PMID: 26101084 DOI: 10.1016/j.envint.2015.05.016] [Citation(s) in RCA: 148] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Revised: 05/11/2015] [Accepted: 05/24/2015] [Indexed: 05/22/2023]
Abstract
BACKGROUND Studies from several countries report increases in rates of gestational diabetes mellitus (GDM) over recent decades. Exposure to environmental chemicals could contribute to this trend. OBJECTIVES To determine the associations between plasticisers and metals measured in early pregnancy with impaired glucose tolerance (IGT) and GDM in a Canadian pregnancy cohort. METHODS Women enrolled in the Maternal-Infant Research on Environmental Chemicals (MIREC) Study were included if they had a singleton delivery and did not have pre-existing diabetes. Eleven phthalate metabolites and total bisphenol A (BPA) were measured in first-trimester urine samples, and four metals (lead, cadmium, mercury and arsenic) were measured in first-trimester blood samples. IGT and GDM were assessed in accordance with standard guidelines by chart review. Chemical concentrations were grouped by quartiles, and associations with outcomes were examined using logistic regression with adjustment for maternal age, race, pre-pregnancy BMI, and education. Restricted cubic spline analysis was performed to help assess linearity and nature of any dose-response relationships. RESULTS Of 2001 women recruited into the MIREC cohort, 1274 met the inclusion criteria and had outcome data and biomonitoring data measured for at least one of the chemicals we examined. Elevated odds of GDM were observed in the highest quartile of arsenic exposure (OR = 3.7, 95% CI = 1.4-9.6) in the adjusted analyses. A significant dose-response relationship was observed in a cubic spline model between arsenic and odds of GDM (p < 0.01). No statistically significant associations were observed between phthalates or BPA or other metals with IGT or GDM. CONCLUSIONS Our findings add to the growing body of evidence supporting the role of maternal arsenic exposure as a risk factor for gestational diabetes.
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Affiliation(s)
- G D Shapiro
- Department of Social and Preventive Medicine, Université de Montréal, Montréal, Quebec, Canada; CHU Sainte-Justine Research Centre, Université de Montréal, Montréal, Quebec, Canada
| | - L Dodds
- Dalhousie University, Halifax, Nova Scotia, Canada.
| | | | | | - W Fraser
- CHU Sainte-Justine Research Centre, Université de Montréal, Montréal, Quebec, Canada; Department of Obstetrics and Gynecology, Université de Montréal, Montréal, Quebec, Canada
| | - M Fisher
- Health Canada, Ottawa, Ontario, Canada
| | - S Taback
- University of Manitoba, Winnipeg, Manitoba, Canada
| | - E Keely
- University of Ottawa, Ottawa, Ontario, Canada
| | - M F Bouchard
- CHU Sainte-Justine Research Centre, Université de Montréal, Montréal, Quebec, Canada
| | - P Monnier
- McGill University, Montréal, Quebec, Canada
| | - R Dallaire
- Laval University, Québec City, Quebec, Canada
| | - As Morisset
- CHU Sainte-Justine Research Centre, Université de Montréal, Montréal, Quebec, Canada
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Affiliation(s)
- M Savary
- ENT Clinic, CHUV, Lausanne, Switzerland
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Hoetzenecker K, Leonhard M, Marta G, Schweiger T, Denk D, Monnier P, Bigenzahn W, Klepetko W. Korrektur laryngotrachealer Stenosen bei Kindern – eine Fallserie. Zentralbl Chir 2014. [DOI: 10.1055/s-0034-1389308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Hotzenecker K, Marta G, Monnier P, Bigenzahn W, Klepetko W. 339-I * LARYNGOTRACHEAL RECONSTRUCTION WITH CARTILAGE EXPANSION. Interact Cardiovasc Thorac Surg 2013. [DOI: 10.1093/icvts/ivt372.339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Karle TJ, Raineri F, Roppo V, Bordas F, Monnier P, Ali S, Sivan I, Raj R. Temporal ringdown of silicon-on-insulator racetrack resonators. Opt Lett 2013; 38:2304-2306. [PMID: 23811910 DOI: 10.1364/ol.38.002304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Ring-down temporal measurements of silicon-on-insulator wire racetrack resonators are performed with 150 fs input pulses using a parametric process in a nonlinear crystal to gate and amplify the weak output pulses. We measure the cavity round trip time and the quality factor of these all-pass filters and find excellent agreement with continuous wave spectroscopic measurements as well as with an analytic model built using numerical solutions for the fully vectorial waveguide modes.
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Affiliation(s)
- T J Karle
- School of Physics, University of Melbourne, Melbourne 3010 Australia
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Mechet P, Raineri F, Bazin A, Halioua Y, Spuesens T, Karle TJ, Regreny P, Monnier P, Van Thourhout D, Sagnes I, Raj R, Roelkens G, Morthier G. Uniformity of the lasing wavelength of heterogeneously integrated InP microdisk lasers on SOI. Opt Express 2013; 21:10622-10631. [PMID: 23669918 DOI: 10.1364/oe.21.010622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report a high lasing wavelength uniformity of optically pumped InP-based microdisk lasers processed with electron-beam lithography, heterogeneously integrated with adhesive bonding on silicon-on-insulator (SOI) waveguide circuits and evanescently coupled to an underlying waveguide. We study the continuous wave laser emission coupling out of the SOI via a grating coupler etched at one side of the waveguide, and demonstrate a standard deviation in lasing wavelength of nominally identical devices on the same chip lower than 500 pm. The deviation in the diameter of the microdisks as low as a few nanometers makes all-optical signal processing applications requiring cascadability possible.
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Affiliation(s)
- P Mechet
- 1imec - Ghent University, Photonics Research Group, Department of Information Technology, INTEC, Sint-Pietersnieuwstraat 41, 9000 Ghent, Belgium.
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Caballero P, Alonso J, Cortes S, Caballero Campo M, Gago M, Nunez-Calonge R, Ricciarelli E, Gomez Palomares JL, Bruna Catalan I, Hernandez ER, Grzegorczyk-Martin V, Belaisch-Allart J, Mayenga JM, Kulski O, Plachot M, Darby HC, Florensa Bargallo M, Perals Vazquez N, Esbert Algam M, Belles Fernandez M, Ballesteros Boluda A, Calderon de Oya G, Alegre de Miquel M, Choudhary M, Ramineni A, Stewart J, Cabello Y, Ricciarelli E, Fernandez-Shaw S, Mercader A, Herrer R, Arroyo G, Del Rio F, Carrera M, Fernandez Sanchez M, Sumimoto T, Kataoka N, Ogata H, Mizuta S, Tokura Y, Yamada S, Ogata S, Mizusawa Y, Matsumoto Y, Okamoto E, Kokeguchi S, Shiotani M, Nagai Y, Otsuki J, Maeda K, Momma Y, Takahashi K, Chuko M, Miwa A, Nagai A, Seggers J, Haadsma ML, La Bastide-van Gemert S, Heineman MJ, Kok JH, Middelburg KJ, Roseboom TJ, Schendelaar P, Van den Heuvel ER, Hadders-Algra M, Schendelaar P, Hadders-Algra M, Heineman MJ, Jongbloed-Pereboom M, La Bastide-Van Gemert S, Middelburg KJ, Van den Heuvel ER, Heineman KR, Schendelaar P, Middelburg KJ, Bos AF, Heineman MJ, Kok JH, La Bastide-Van Gemert S, Seggers J, Van den Heuvel ER, Hadders-Algra M, Kondapalli LA, Shaunik A, Molinaro TA, Ratcliffe SJ, Barnhart KT, Haadsma M, Seggers J, Bos AF, Heineman MJ, Keating P, Middelburg KJ, Van Hoften JC, Veenstra-Knol HE, Kok JH, Cobben JM, Hadders-Algra M, Pirkevi C, Atayurt Z, Yelke H, Kahraman S, Desmyttere S, Verpoest W, Haentjens P, Verheyen G, Liebaers I, Bonduelle M, Winter C, Van Acker F, Desmyttere S, De Schrijver F, Bonduelle M, Nekkebroeck J, Pariente-Khayat A, de Laubier A, Fehily D, Lemardeley G, Merlet F, Creusvaux H, Nakajo Y, Sakamoto E, Doshida M, Toya M, Nasu I, Kyono K, Schats R, Vergouw CG, Kostelijk EH, Doejaaren E, Hompes PGA, Lambalk CB, Nakamura Y, Takisawa T, Shibuya Y, Sato Y, Sato K, Kyono K, Berard A, Chaabane S, Sheehy O, Blais L, Fraser W, Bissonnette F, Monnier P, Tan SL, Trasler J, Subramaniam A, Chiappetta R, Mania A, Trew G, Lavery SA, van den Akker O, Purewal S, Bunnell C, Lashen H, Terriou P, Giorgetti C, Porcu-Buisson G, Roger V, Chinchole JM, Hamon V, Allemand-Sourieu J, Cravello L, Moreau J, Chabert-Orsini V, Belva F, Roelants M, De Schepper J, Roseboom TJ, Bonduelle M, Devroey P, Painter RC, Machin L, Fearon K, Morishima K, Fujimoto A, Oishi H, Hirata T, Harada M, Hasegawa A, Osuga Y, Yano T, Kozuma S, Taketani Y. QUALITY AND SAFETY OF ART THERAPIES. Hum Reprod 2012. [DOI: 10.1093/humrep/27.s2.86] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Halioua Y, Bazin A, Monnier P, Karle TJ, Roelkens G, Sagnes I, Raj R, Raineri F. Hybrid III-V semiconductor/silicon nanolaser. Opt Express 2011; 19:9221-9231. [PMID: 21643176 DOI: 10.1364/oe.19.009221] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Heterogeneous integration of III-V compound semiconductors on Silicon on Insulator is one the key technology for next-generation on-chip optical interconnects. In this context, the use of photonic crystals lasers represents a disruptive solution in terms of footprint, activation energy and ultrafast response. In this work, we propose and fabricate very compact laser sources integrated with a passive silicon waveguide circuitry. Using a subjacent Silicon-On-Insulator waveguide, the emitted light from a photonic crystal based cavity laser is efficiently captured. We study experimentally the evanescent wave coupling responsible for the funneling of the emitted light into the silicon waveguide mode as a function of the hybrid structure parameters, showing that 90% of coupling efficiency is possible.
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Affiliation(s)
- Y Halioua
- Laboratoire de Photonique et de Nanostructures, CNRS-UPR20, Route de Nozay, 91460 Marcoussis, France
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Troude P, Bailly E, Guibert J, Bouyer J, de La Rochebrochard E, Velez MP, Abad G, Robert JM, Bissonnette F, Kadoch IJ, Oudi M, Sazvar S, Alizadeh L, Ezabadi Z, Samani Omani R, Monnier P, Sheehy O, Fraser W, Bissonnette F, Tan SL, Trasler J, Chaabane S, Berard A, Nelson SM, Lawlor DA, Kasius JC, Eijkemans MJC, Mol BW, Fauser BC, Broekmans FJM, Farquhar C, Riddel C, MacDonald A, Raj N, Chan E, Mol BW, van den Boogaard N, Nikitin SV, Karpeev SA, Karpova SV. POSTER VIEWING SESSION - REPRODUCTIVE EPIDEMIOLOGY AND HEALTH ECONOMY. Hum Reprod 2011. [DOI: 10.1093/humrep/26.s1.91] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Monnier P, Edler J, McGough R. Estimating the properties of the chromatic mechanisms mediating the processing of large color differences. J Vis 2010. [DOI: 10.1167/10.15.6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Bencheikh K, Baldit E, Briaudeau S, Monnier P, Levenson JA, Mélin G. Slow light propagation in a ring erbium-doped fiber. Opt Express 2010; 18:25642-25648. [PMID: 21164910 DOI: 10.1364/oe.18.025642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Slow light propagation is demonstrated by implementing Coherent Population Oscillations in a silica fiber doped with erbium ions in a ring surrounding the single mode core. Though only the wings of the mode interact with erbium ions, group velocities around 1360 m/s are obtained without any spatial distortion of the propagating mode.
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Affiliation(s)
- K Bencheikh
- Laboratoire de Photonique et de Nanostructures, CNRS UPR20, F-91460 Marcoussis, France.
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Monnier P, Volbrecht V. Changes in the space-average S-cone stimulation of inducing patterns suggest an interaction among the different cone-types. J Vis 2010. [DOI: 10.1167/10.7.433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Monnier P. Searching for vasiegated elements. J Vis 2010. [DOI: 10.1167/8.6.575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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21
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Monnier P. The bandwidth of chromatic mechanisms mediating visual search. J Vis 2010. [DOI: 10.1167/7.9.680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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22
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Edler J, Monnier P. Configural asymmetries in visual search are robust to changes in the spatial arrangement of the search elements. J Vis 2010. [DOI: 10.1167/9.8.1193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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23
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Monnier P, Shevell SK. Color shifts from patterned backgrounds: Spatial frequency selectivity and contrast sensitivity. J Vis 2010. [DOI: 10.1167/3.9.701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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24
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Monnier P, Troup LJ. Classical definitions of chromatic induction are inadequate for induction with S-cone patterned backgrounds. J Vis 2010. [DOI: 10.1167/6.6.241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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25
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Shevell SK, Monnier P. Induction from patterned S-cone backgrounds: Receptoral or postreceptoral basis? J Vis 2010. [DOI: 10.1167/3.9.141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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26
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Estrada LC, Martinez OE, Brunstein M, Bouchoule S, Le-Gratiet L, Talneau A, Sagnes I, Monnier P, Levenson JA, Yacomotti AM. Small volume excitation and enhancement of dye fluorescence on a 2D photonic crystal surface. Opt Express 2010; 18:3693-9. [PMID: 20389379 DOI: 10.1364/oe.18.003693] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
We demonstrate an easy-to-implement scheme for fluorescence enhancement and observation volume reduction using photonic crystals (PhCs) as substrates for microscopy. By normal incidence coupling to slow 2D-PhC guided modes, a 65 fold enhancement in the excitation is achieved in the near field region (100 nm deep and 1 microm wide) of the resonant mode. Such large enhancement together with the high spatial resolution makes this device an excellent substrate for fluorescence microscopies.
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Affiliation(s)
- L C Estrada
- Quantum Electronics Lab, Dpto. de Física. FCEN, Universidad de Buenos Aires, 1428, Buenos Aires, Argentina
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Forges T, Pellanda H, Diligent C, Monnier P, Guéant JL. Les folates : quel impact sur la fertilité ? ACTA ACUST UNITED AC 2008; 36:930-9. [DOI: 10.1016/j.gyobfe.2008.07.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2008] [Accepted: 07/06/2008] [Indexed: 12/16/2022]
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28
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Leuchter I, Monnier P, Brossard E, Schweizer V. [Gastroesophageal reflux: a possible cause of paroxysmal laryngeal dyspnea]. Rev Med Suisse 2008; 4:1113-1117. [PMID: 18610725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
An important number of patients are referred to the ENT specialist because of extraoesophageal manifestations of gastroesophageal reflux. The most alarming symptom is a paroxysmal dyspnea secondary to a laryngospasm. The patients report a laryngeal choking sensation associated to an aphonia. We report three cases of laryngospasm secondary to acid gastric reflux. The diagnosis was made with the clinical history, a laryngeal examination and a 24-hour pH-monitoring enabled us to demonstrate a clear temporal relation between the reflux episodes and the choking episodes. In conclusion, the pharyngo-laryngeal reflux is a possible cause of laryngospasm. In our three patients, a high dose antiacid treatment was efficient to bring a lasting relief of the symptoms.
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Affiliation(s)
- I Leuchter
- Unité de phoniatrie et de logopédie, CHUV, 1011 Lausanne.
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29
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Monnier P, Guyot JP. [Plea for a return to medicine by physicians, or the blues of chiefs of university services]. Rev Med Suisse 2007; 3:2195-2197. [PMID: 17970151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
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30
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Vecchi G, Raineri F, Sagnes I, Yacomotti A, Monnier P, Karle TJ, Lee KH, Braive R, Le Gratiet L, Guilet S, Beaudoin G, Taneau A, Bouchoule S, Levenson A, Raj R. Continuous-wave operation of photonic band-edge laser near 1.55 microm on silicon wafer. Opt Express 2007; 15:7551-7556. [PMID: 19547080 DOI: 10.1364/oe.15.007551] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We report on the continuous-wave operation of a band edge laser at room temperature near 1.55 mum in an InGaAs/InP photonic crystal. A flat dispersion band-edge photonic mode is used for surface normal operation. The photonic crystal slab is integrated onto a Silicon chip by means of Au/In bonding technology, which combines two advantages, efficient heat sinking and broad band reflectivity.
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Abstract
Because of the high degree of complexity of assisted reproduction techniques (ART), the human and conscious dimensions of infertility problems are often neglected. Different strategies may help infertile couples coping with infertility and related treatments; among these, Caycedian sophrology relies on the cognitive, emotional, and somatic aspects of consciousness. In the present article, the authors report on their experience with sophrologic support for infertile patients by a midwife qualified in caycedian sophrology. Overall, since 1988, 310 couples have benefied from this kind of support, with an average of 10 sophrologic trainings per patient. Whereas some couples consider sophrology as a short time training to better cope with any particular aspect of their infertility treatment, others want to undertake more profound work on their body scheme. The authors wish to call the attention of ART professionals to this kind of medical support for infertile couples, and also to the particular role of midwives with sophrologic competence in an ART center.
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Affiliation(s)
- O Heymès
- UF d'AMP, Maternité Régionale Universitaire, 10, rue du Docteur-Heydenreich, CS 74213, 54042 Nancy Cedex.
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32
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Yacomotti AM, Monnier P, Raineri F, Bakir BB, Seassal C, Raj R, Levenson JA. Fast thermo-optical excitability in a two-dimensional photonic crystal. Phys Rev Lett 2006; 97:143904. [PMID: 17155254 DOI: 10.1103/physrevlett.97.143904] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2006] [Indexed: 05/12/2023]
Abstract
We experimentally demonstrate excitability in a semiconductor two-dimensional photonic crystal. Excitability is a nonlinear dynamical mechanism underlying pulselike responses to small perturbations in systems possessing one stable state. We show that a band-edge photonic crystal resonator exhibits class II excitability, resulting from the nonlinear coupling between the high-Q optical mode, the charge-carrier density, and the fast (sub-micros) thermal dynamics. In this context, the critical slowing down of the electro-optical dynamics close to the excitable threshold can delay the optical response by an amount comparable to the duration of the output pulse (5 ns). The latter results from a short thermal dynamical excursion along a high local intensity manifold of the phase space.
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Affiliation(s)
- A M Yacomotti
- Laboratoire de Photonique et de Nanostructures (CNRS UPR 20), Route de Nozay, 91460 Marcoussis, France.
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Yacomotti AM, Raineri F, Cojocaru C, Monnier P, Levenson JA, Raj R. Nonadiabatic dynamics of the electromagnetic field and charge carriers in high-Q photonic crystal resonators. Phys Rev Lett 2006; 96:093901. [PMID: 16606266 DOI: 10.1103/physrevlett.96.093901] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2005] [Indexed: 05/08/2023]
Abstract
We address, both experimentally and theoretically, phase and amplitude dynamics of the electromagnetic field in a two-dimensional photonic crystal when femtosecond pulses are injected. We demonstrate that the usual adiabatic approximation underlying the dynamics of field and carriers in a semiconductor resonator is no longer valid, since in general the photon lifetime cannot be neglected with respect to the carrier recombination lifetime. Parameter regions where adiabaticity is broken are shown, and the ubiquity of the observed dynamical scenario in the new generation of active photonic microresonators is predicted.
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Affiliation(s)
- A M Yacomotti
- Laboratoire de Photonique et de Nanostructures (CNRS UPR 20), Route de Nozay - 91460 Marcoussis-France.
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Jaquet Y, Pilloud R, Grosjean P, Radu A, Monnier P. [Endoscopic mucosal resection for the treatment of superficial adenocarcinima developed on the Barrett's mucosa]. Rev Med Suisse 2005; 1:2385-6, 2389-90. [PMID: 16300281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
We present a new technique of endoscopic mucosal resection for the treatment of extended superficial lesions of the esophagus such as early squamous cell carcinoma, high grade intraepithelial neoplasia or early adenocarcinoma arising in Barrett's esophagus. A modified rigid esophagoscope has been designed. A large mucosal area is sucked against a perforated 180 degrees window. Mucosal resection is performed by an electrical wire loop at a constant depth of 1 +/- 0,1 mm. The resected surface varies from 4 to 12 cm2. Circumferential resection consists of two opposite hemi-circumferential resections. The resection yields one or two specimens only for histological study allowing easy orientation and analysis of the resection margins. The deep resection margin is precisely located at the submucosal level, a prerequisite for a safe resection of T1a cancers.
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Affiliation(s)
- Y Jaquet
- Service d'ORL et chirurgie cervico-faciale, CHUV, Lausanne.
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35
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Bron L, Monnier P. [Cancer of the esophagus: news]. Rev Med Suisse 2005; 1:2284-7. [PMID: 16268452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Affiliation(s)
- L Bron
- Service ORL et Chirurgie cervico-faciale, CHUV, Lausanne.
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36
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Baldit E, Bencheikh K, Monnier P, Levenson JA, Rouget V. Ultraslow light propagation in an inhomogeneously broadened rare-earth ion-doped crystal. Phys Rev Lett 2005; 95:143601. [PMID: 16241652 DOI: 10.1103/physrevlett.95.143601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2005] [Indexed: 05/05/2023]
Abstract
We show that coherent population oscillations effect allows us to burn a narrow spectral hole (26 Hz) within the homogeneous absorption line of the optical transition of an erbium ion-doped crystal. The large dispersion of the index of refraction associated with this hole permits us to achieve a group velocity as low as 2.7 m/s with a transmission of 40%. We especially benefit from the inhomogeneous absorption broadening of the ions to tune both the transmission coefficient, from 40% to 90%, and the light group velocity from 2.7 m/s to 100 m/s.
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Affiliation(s)
- E Baldit
- Laboratoire de Photonique et de Nanostructures LPN-CNRS UPR 020, Route de Nozay, 91460 Marcoussis, France
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37
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Monnier P, Shevell SK, Young EJ. Induction from a chromatic pattern that cannot be seen. J Vis 2005. [DOI: 10.1167/5.8.98] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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38
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Raineri F, Cojocaru C, Raj R, Monnier P, Levenson A, Seassal C, Letartre X, Viktorovitch P. Tuning a two-dimensional photonic crystal resonance via optical carrier injection. Opt Lett 2005; 30:64-66. [PMID: 15648639 DOI: 10.1364/ol.30.000064] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We report on wide wavelength tuning through optical injection of carriers of a photonic resonance observed in reflectivity at 1543 nm in an InP-based two-dimensional photonic crystal slab. An 8-nm blueshift, which represents 20 times the resonance linewidth, is observed when a 4-kW/cm2 intense optical pump is incident on the sample. An analytical model that we developed, based on a coupled-mode nonlinear approach, allows us to describe this phenomenon in detail.
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Affiliation(s)
- F Raineri
- Laboratoire de Photonique et de Nanostructures-Centre National de la Recherche Scientifique-Route de Nozay, 91460 Marcoussis, France.
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39
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Affiliation(s)
- P Monnier
- Department of Otolaryngology and Head and Neck Surgery, University Hospital CHUV, 1011, Lausanne, Switzerland, +41-21-3142700
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40
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Bron LP, Soldati D, Monod ML, Mégevand C, Brossard E, Monnier P, Pasche P. Horizontal partial laryngectomy for supraglottic squamous cell carcinoma. Eur Arch Otorhinolaryngol 2004; 262:302-6. [PMID: 15316823 DOI: 10.1007/s00405-004-0824-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2003] [Accepted: 06/07/2004] [Indexed: 11/28/2022]
Abstract
Between 1981-1999, 75 patients treated for supraglottic SCC with horizontal supraglottic laryngectomy (HSL) at the Otolaryngology Head and Neck Surgery Department of Lausanne University Hospital were retrospectively studied. There were 16 patients with T1, 46 with T2 and 13 with T3 tumors. Among these, 16 patients (21%) had clinical neck disease corresponding to stage I, II, III and IV in 12, 39, 18 and 6 patients, respectively. All patients had HSL. Most patients had either elective or therapeutic bilateral level II-IV selective neck dissection. Six patients (8%) with advanced neck disease had ipsilateral radical and controlateral elective II-IV selective neck dissections. Adjuvant radiotherapy was given to 25 patients (30%) for either positive surgical margins (n=8), pathological nodal status (n=14) or both (n=3). Median follow-up was 48 months (range, 24-199). Five-year disease-specific survival and locoregional and local control were 92, 90 and 92.5%, respectively. Among five patients who were diagnosed with local recurrence, one had a total laryngectomy (1.4%); the others were treated by endoscopic laser surgery. Two patients had both a local and regional recurrence. They were salvaged with combined surgery and radiotherapy, but eventually died of their disease. Cartilage infiltration seems to influence both local control (P=0.03) and disease-specific survival (P=0.06). There was a trend for worse survival with pathological node involvement (P=0.15) and extralaryngeal extension of the cancer (P=0.1). All patients except one recovered a close to normal function after the treatment. Aspiration was present in 16 patients (26%) in the early postoperative period. A median of 16 days (7-9) was necessary to recover a close to normal diet. Decannulation took a median of 17 days (8-93). Seven patients kept a tracheotomy tube for up to 3 months because of persistent aspiration. There was no permanent tracheostomy or total laryngectomy for functional purposes. Horizontal supraglottic laryngectomy remains an adequate therapeutic alternative for supraglottic squamous cell carcinoma, offering an excellent oncological outcome. The postoperative functional morbidity is substantial, indicating the need for careful patient selection, but good laryngeal function recovery is the rule. The surgical alternative is endoscopic laser surgery, which may offer comparable oncological results with less functional morbidity. Nevertheless, these two different techniques need to be compared prospectively.
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Affiliation(s)
- L P Bron
- Department of Otorhinolaryngology and Head and Neck Surgery, Centre Hospitalier Universitaire Vaudois, CHUV BH-12/709, 1011 Lausanne, Switzerland.
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41
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Monnier P. The disciminability of a target defined along multiple dimensions can be accounted for by probability summation. J Vis 2004. [DOI: 10.1167/4.8.684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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42
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Abstract
BACKGROUND AND STUDY AIMS : There is a growing trend toward the use of minimally invasive endoscopic methods to treat early esophageal cancers. Although there is continuing controversy regarding the management of Barrett's esophagus and the value of surveillance programs continues to be debated, the ultimate goal is to eradicate all of the foci of intestinal metaplasia and hence the risk of developing an adenocarcinoma. A number of ablative techniques have so far been applied, but none has yet been shown to be superior and entirely satisfactory. The present study evaluates the feasibility, efficacy, and safety of a promising new method of endoscopic mucosal resection (EMR) in a sheep model, based on the use of a modified rigid esophagoscope. MATERIALS AND METHODS The resectoscope consists of a rigid esophagoscope with a distal transparent window through which the mucosa and part of the submucosa are sucked in and then resected with a wire loop. The sheep model was chosen because of its similarities to human anatomy with regard to the thickness and histological structure of the esophagus. Fifty-five separate hemicircumferential resections and 11 circumferential resections were carried out in 21 and 11 animals, respectively. Mitomycin C, an agent inhibiting fibroblast proliferation, was administered at different time intervals after eight circumferential resections to prevent the development of esophageal strictures. RESULTS All of the specimens of hemicircumferential resections were obtained as single distinct pieces and were easily examined histologically. The surface of the specimen correlated with the size of the window and ranged from 6 to 12 cm (2). In circumferential resections, the specimens were obtained in two pieces. An accurate resection depth through the submucosa was achieved in 58 of 65 resected specimens. No complications occurred after hemicircumferential resections. Complications after circumferential resections (stenosis or perforation, or both) were minimized after appropriate timing of mitomycin C administration. CONCLUSIONS This EMR method offers a promising approach in comparison with other options currently available. It appears to be superior in terms of the size of the resected specimen, the precision and regularity of the resection depth, and the accuracy of histological diagnosis with safety margins. Hemicircumferential EMRs have been shown to be safe in the sheep model. This new technique warrants further animal studies before being used for circumferential EMR in humans.
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Affiliation(s)
- A Radu
- Dept. of Otolaryngology, Head and Neck Surgery, CHUV Hospital, Lausanne, Switzerland
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Borle F, Radu A, Fontolliet C, van den Bergh H, Monnier P, Wagnières G. Selectivity of the photosensitiser Tookad for photodynamic therapy evaluated in the Syrian golden hamster cheek pouch tumour model. Br J Cancer 2004; 89:2320-6. [PMID: 14676813 PMCID: PMC2395293 DOI: 10.1038/sj.bjc.6601428] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The response to photodynamic therapy (PDT) with the photosensitiser (PS) Tookad® was measured in the Syrian hamster cheek pouch model on normal mucosae and chemically induced squamous cell carcinoma. This PS is a palladium-bacteriopheophorbide presenting absorption peaks at 538 and 762 nm. The light dose, drug dose and drug injection-light irradiation times (DLI), ranging between 100 and 300 J cm−2, 1–5 mg kg−1 and 10–240 min respectively, were varied and the response to PDT was analysed by staging the macroscopic response and by the histological examination of the sections of the irradiated cheek pouch. A fast time decay of the tissular response with drug dose of 1–5 mg kg−1 was observed for DLI ranging from 10 to 240 min and for light doses of 100–300 J cm−2 delivered at a light dose rate of 150 mW cm−2. A significantly higher level of tissular response was observed for squamous cell carcinoma compared to normal tissue. Nevertheless, the threshold level of the drug–light dose for a detectable response was not significantly different in the tumoral vs normal tissue. The highest response at the shortest DLIs and the absence of measurable response at DLI larger than 240 min at light dose of 300 J cm−2 and drug dose of 5 mg kg−1 reveals the predominantly vascular effect of Tookad®. This observation suggests that Tookad® could be effective in PDT of vascularised lesions.
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Affiliation(s)
- F Borle
- Institute of Environmental Engineering, Swiss Federal Institute of Technology (EPFL), CH-1015 Lausanne, Switzerland
| | - A Radu
- Department of Otolaryngology, Head and Neck Surgery, CHUV Hospital, CH-1011 Lausanne, Switzerland
| | - C Fontolliet
- Institute of Pathology, University of Lausanne, CH-1011 Lausanne, Switzerland
| | - H van den Bergh
- Institute of Environmental Engineering, Swiss Federal Institute of Technology (EPFL), CH-1015 Lausanne, Switzerland
| | - P Monnier
- Department of Otolaryngology, Head and Neck Surgery, CHUV Hospital, CH-1011 Lausanne, Switzerland
| | - G Wagnières
- Institute of Environmental Engineering, Swiss Federal Institute of Technology (EPFL), CH-1015 Lausanne, Switzerland
- Institute of Environmental Engineering, Swiss Federal Institute of Technology (EPFL), CH-1015 Lausanne, Switzerland. E-mail:
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Scolozzi P, Lombardi T, Monnier P, Jaques B. Multisystem Langerhans' cell histiocytosis (Hand-Schüller-Christian disease) in an adult: a case report and review of the literature. Eur Arch Otorhinolaryngol 2003; 261:326-30. [PMID: 14551790 DOI: 10.1007/s00405-003-0690-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2003] [Accepted: 09/03/2003] [Indexed: 11/30/2022]
Abstract
Langerhans' cell histiocytosis (LCH) is a rare and enigmatic clonal disorder that affects mainly children. It is characterized by single or multiple granulomatous mass lesions composed of cells with the Langerhans' cell phenotype. Clinical presentation and behavior are heterogeneous and can range from a solitary lytic bone lesion (i.e., eosinophilic granuloma) with a favorable course to a fatal disseminated leukaemia-like form, with a wide spectrum of intermediate clinical presentations between these two extremes. Although LCH typically involves the bone, lesions can be found in almost all organs. We are reporting the case of a multisystem LCH in a 47-year-old patient who presented with a panhypopituitarism and diabetes insipidus, and who, 5 years later, developed mandibular, mastoid and femoral lesions. The final diagnosis of LCH was made on mandibular biopsy.
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Affiliation(s)
- P Scolozzi
- Division of Oral and Maxillofacial Surgery, Centre Hospitalier Universitaire Vaudois (CHUV), 1011 Lausanne, Switzerland.
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45
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Stepinac T, Felley C, Jornod P, Lange N, Gabrecht T, Fontolliet C, Grosjean P, vanMelle G, van den Bergh H, Monnier P, Wagnières G, Dorta G. Endoscopic fluorescence detection of intraepithelial neoplasia in Barrett's esophagus after oral administration of aminolevulinic acid. Endoscopy 2003; 35:663-8. [PMID: 12929061 DOI: 10.1055/s-2003-41514] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
BACKGROUND AND STUDY AIMS Barrett's esophagus is strongly associated with adenocarcinoma. Early malignant transformation of the Barrett's mucosa is often not visible endoscopically and may remain undetected until the invasive adenocarcinoma stage. Endoscopic surveillance is currently carried out on random four-quadrant biopsies at 1-2 cm intervals. Endoscopic fluorescence detection of protoporphyrin IX induced by 5-aminolevulinic acid can identify premalignant lesions. This study evaluates endoscopic fluorescence detection in patients having Barrett's esophagus and compares the results to those of standard endoscopy with random four-quadrant biopsies. PATIENTS AND METHODS The study included 30 examinations in 28 patients (22 men, 6 women; age range 37-78 years, mean age 60 years,), with five patients having known intraepithelial neoplasia. A dose of 20 mg/kg of 5-aminolevulinic acid was given orally 5 hours before examination. Random four-quadrant biopsies were performed 4-6 weeks before endoscopic fluorescence detection. RESULTS Of the biopsies taken during the endoscopic fluorescence detection procedure, 28 % (23/81) were true positives. More than one-third of the false-positive results were due to inflammation. None of the 97 control biopsies taken on nonfluorescing areas during endoscopic fluorescence detection were dysplastic. Endoscopic fluorescence detection showed low-grade intraepithelial neoplasia in five patients which was not diagnosed with random four-quadrant biopsies, while random four-quadrant biopsies alone showed three low-grade intraepithelial neoplasias that were invisible during endoscopic fluorescence detection. All high-grade intraepithelial neoplasias or adenocarcinomas (2/2) were detected with both methods. CONCLUSIONS Fluorescence detection achieved a similar performance when compared with four-quadrant random biopsy, but resulted in fewer biopsies (81 for endoscopic fluorescence detection vs 531 for random four-quadrant biopsies).
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Affiliation(s)
- T Stepinac
- Institute of Environmental Engineering, Swiss Federal Institute of Technology, Lausanne, Switzerland
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Lacau Saint Guily J, Boisson-Bertrand D, Monnier P. [Lesions to lips, oral and nasal cavities, pharynx, larynx, trachea and esophagus due to endotracheal intubation and its alternatives]. Ann Fr Anesth Reanim 2003; 22 Suppl 1:81s-96s. [PMID: 12943864 DOI: 10.1016/s0750-7658(03)00163-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Dysphagia of greater than 48 h duration is an indication for indirect laryngoscopy and when odynophagia and otalgia occur simultaneously, the possibility of subluxation of the arytenoids demands an urgent ENT assessment. The potential seriousness of laryngeal lesions following intubation obliges us to use the smallest compatible endotracheal tube. The occurrence of pain cervical surgical emphysema and fever suggests a pharyngeal lesion necessitating the suspension of oral feeding and the initiation of antibiotic therapy with anaerobic activity, while awaiting possible surgical intervention. There is no argument to use a tooth-guard for each intubation, but tooth fragility must be researched. The incidence of nasal fossa trauma is reduced with the use of nasal packs impregnated with local anaesthetic containing a vasoconstrictor. This allows the introduction of a small flexible lubricated tube. Laryngeal mask-induced sore throat is more common than the more serious injuries. The classical technique of introducing a laryngeal mask of appropriate size (4 for women, 5 for men) in which the cuff is inflated to a leak pressure of 20 cm H(2)O reduces this frequency. The facial mask may cause injuries especially with prolonged use. The incidence of pulmonary aspiration, linked to the action of drugs, raised intra-abdominal pressure; an emergent situation or difficult intubation is decreased with the performance of the Sellick maneuver at intubation, rapid induction and the neutralization of gastric acidity. A meticulous technique of insertion of the, individualized anaesthesia, particular vigilance at the time of decurarisation and position changes and a calm awakening assure its optimal use, unless the Proseal laryngeal mask modifies this point of view.
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Affiliation(s)
- J Lacau Saint Guily
- Service d'ORL et chirurgie cervico-faciale, hôpital Tenon, 75970 Paris cedex 20, France
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Monnier P, Lang F, Savary M. Partial cricotracheal resection for pediatric subglottic stenosis: a single institution's experience in 60 cases. Eur Arch Otorhinolaryngol 2003; 260:295-7. [PMID: 12904983 DOI: 10.1007/s00405-002-0465-y] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2001] [Accepted: 03/06/2002] [Indexed: 11/26/2022]
Abstract
In our study, 60 infants and children, each with a severe subglottic stenosis (SGS), underwent partial cricotracheal resection (PCTR) with primary thyrotracheal anastomosis. According to the Myer-Cotton classification, two were grade II, 41 were grade III and 17 were grade IV stenoses. Of the 60 patients, 57 (95%) are presently decannulated, and one patient sustained a complete restenosis. Two patients with better than 80% subglottic airways still are waiting for decannulation: one because of bilateral cricoarytenoid joint fixation and the second because of temporary stenting of the subglottis with a Montgomery T-tube. The rate of decannulation is 97% (36 of 37 cases) in primary PCTRs, 100% (13 of 13 cases) in salvage PCTRs for failed laryngotracheal reconstructions (LTR) and 70% (7 of 10 cases) in extended PCTRs (i.e., PCTR associated with an additional open-airway procedure).
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Affiliation(s)
- P Monnier
- Department of Otolaryngology and Head and Neck Surgery, University Hospital, CHUV, 1011 Lausanne, Switzerland.
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Blant SA, Glanzmann TM, Ballini JP, Wagnières G, van den Bergh H, Monnier P. Uptake and localisation of mTHPC (Foscan) and its 14C-labelled form in normal and tumour tissues of the hamster squamous cell carcinoma model: a comparative study. Br J Cancer 2002; 87:1470-8. [PMID: 12454779 PMCID: PMC2376296 DOI: 10.1038/sj.bjc.6600651] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2002] [Revised: 09/02/2002] [Accepted: 09/16/2002] [Indexed: 11/30/2022] Open
Abstract
The aim of this study was to evaluate the pharmacokinetics of meta(tetrahydroxyphenyl)chlorin (mTHPC) on different tissues of interest in a hamster tumour model and to confirm our earlier animal studies on semi-quantitative fluorescence microscopy. The results obtained by three different evaluation methods were compared: in vivo spectrofluorometry, ex vivo fluorescence microscopy and chemical extraction of (14)C-labelled mTHPC. Following intracardiac injection of 0.5 mg kg(-1) mTHPC, groups of five tumour-bearing animals were used for in situ light-induced fluorescence spectroscopy. Afterwards, the biopsies were taken and snap frozen for fluorescence microscopy. The presence of radioactivity in serum and tissues was determined after chemical digestion in scintillation fluid using a scintillation counter. For each analysed tissue, a good correlation was observed between the three evaluation methods. The highest fluorescence intensity and quantities of mTHPC were observed between 12 and 24 h in liver, kidney, serum, vascular endothelium and advanced neoplasia. The majority of mTHPC was found at around 48 h in smooth muscle and at 96 h in healthy cheek pouch mucosa and early malignant lesions. The lowest level of mTHPC was noted in striated muscle at all times. No selectivity in dye localisation was observed between early squamous cell carcinoma and healthy mucosa. Soon after the injection, a significant selectivity was noted for advanced squamous cell carcinoma as compared to healthy cheek pouch mucosa or striated muscle. A significant difference in mTHPC localisation and quantity was also observed between striated and smooth muscle during the first 48 h following the injection. Finally, this study demonstrated the usefulness of non-invasive in situ spectroscopic measurements to be performed systematically prior to photodynamic therapy as a real-time monitoring for each treated patient in order to individualise and adapt the light dosimetry and avoid over or under treatments.
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Affiliation(s)
- S Andrejevic Blant
- Institute of Pathology, CHUV-Hospital, Bugnon 21, CH-1011 Lausanne, Switzerland.
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Monnier P, Shevell SK. s=S/(L+M) color shifts modulated by l=L/(L+M) contrast within patterned backgrounds. J Vis 2002. [DOI: 10.1167/2.10.27] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Dumeige Y, Sagnes I, Monnier P, Vidakovic P, Abram I, Mériadec C, Levenson A. Phase-matched frequency doubling at photonic band edges: efficiency scaling as the fifth power of the length. Phys Rev Lett 2002; 89:043901. [PMID: 12144481 DOI: 10.1103/physrevlett.89.043901] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2001] [Indexed: 05/23/2023]
Abstract
By exploiting the unique properties of periodic stratified media we demonstrate simultaneously phase matching and enhancement of the optical field under second order nonlinear interaction. This leads to a second harmonic efficiency growth faster than the fifth power of the structure length, far better than the usual quadratic behavior associated with second order nonlinear effects.
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Affiliation(s)
- Y Dumeige
- Laboratoire de Photonique et de Nanostructures (CNRS UPR 20), Route de Nozay, 91460 Marcoussis, France
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