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Paraskevopoulou D, Bikkina S, Grivas G, Kaskaoutis D, Tsagkaraki M, Tavernaraki K, Mihalopoulos N. A direct method to quantify methanol-soluble organic carbon for brown carbon absorption studies. MethodsX 2023; 11:102313. [PMID: 37663004 PMCID: PMC10470224 DOI: 10.1016/j.mex.2023.102313] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 07/06/2023] [Indexed: 09/05/2023] Open
Abstract
The current research provides a newly developed method to quantify methanol-soluble organic carbon (MeS_OC) in aerosol samples. This analytical procedure allows an accurate separation of MeS-OC component, which is critical for the calculation of mass absorption efficiency (MAE) of ambient Brown Carbon (BrC) and consequently its climate relevant potential. The method includes extraction, filtering and condensation stages, leading to the preparation of a highly concentrated product in which MeS-OC can be precisely quantified by a Sunset Carbon Analyzer in a single analysis step. This method can be applied on aerosol collected using either high or low volume samplers, since a relatively small filter area is required for the determination. Furthermore, it eliminates any misestimation of the MeS-OC mass that may appear in other reported techniques that don't seem to include the precise separation of methanol-soluble fraction in their quantification process.•The mass quantification of methanol-soluble organic carbon is essential, contributing up to 50% to the absorptivity of organic aerosol (BrC) at shorter wavelengths.•The method provides a direct measurement of methanol-soluble aerosol components, resolving any potential uncertainties of previously applied methods.•The adoption of this direct quantification approach leads to a rationalization of past MAE estimates for BrC with implications for radiative transfer models.
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Affiliation(s)
- D. Paraskevopoulou
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, P. Penteli, Athens, 15236, Greece
- Environmental Chemical Processes Laboratory, Department of Chemistry, University of Crete, 70013 Crete
| | - S. Bikkina
- Birbal Sahni Institute of Palaeosciences (BSIP), Lucknow - 226007, Uttar Pradesh, India
| | - G. Grivas
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, P. Penteli, Athens, 15236, Greece
| | - D.G. Kaskaoutis
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, P. Penteli, Athens, 15236, Greece
- Department of Chemical Engineering, University of Western Macedonia, Kozani 50150, Greece
| | - M. Tsagkaraki
- Environmental Chemical Processes Laboratory, Department of Chemistry, University of Crete, 70013 Crete
| | - K. Tavernaraki
- Environmental Chemical Processes Laboratory, Department of Chemistry, University of Crete, 70013 Crete
| | - N. Mihalopoulos
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, P. Penteli, Athens, 15236, Greece
- Environmental Chemical Processes Laboratory, Department of Chemistry, University of Crete, 70013 Crete
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Archontakis S, Oikonomou E, Sideris K, Laina A, Tirovola D, Paraskevopoulou D, Kostakis P, Doundoulakis I, Arsenos P, Ntalakouras I, Charitakis E, Gatzoulis K, Tsioufis K, Sideris S. Safety of same-day discharge versus overnight stay strategy following cardiac device implantations: a high-volume single-centre experience. J Interv Card Electrophysiol 2023; 66:471-481. [PMID: 36063282 PMCID: PMC9442569 DOI: 10.1007/s10840-022-01319-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 07/21/2022] [Indexed: 11/26/2022]
Abstract
BACKGROUND The strategy of cardiac implantable electronic device (CIED) implantations performed as day-case admissions has gained a wider acceptance overtime; however, data on safety are still limited. This study aims to investigate the safety of a same-day discharge protocol introduced in our hospital for the postprocedural management of patients undergoing CIED implantation. METHODS Α prospective, non-interventional, non-randomised study performed in a single high-volume implanting centre for a 16-month period (March 2020 to June 2021). At total of 821 of 965 (85.1%) patients scheduled for elective CIED implantation were considered to be eligible for inclusion in the Short-stay Device Management Protocol. These patients were compared with a historical group of 932 patients, meeting the same inclusion criteria. RESULTS Procedure was successful in 812 patients (98.9%), committed to same-day discharge versus 921 of 932 patients (98.8%) admitted for overnight stay (p = 0.87). Overall, 90-day complication rate was comparable in both groups (4.14% vs 4.07%, p = 0.95), as was major (1.46% vs. 1.82%, p = 0.55) and minor (2.67% vs. 2.25%, p = 0.64) complication rates. The composite early post-procedural complication rates and late post-procedural complication rates were comparable among groups (0.97 vs 1.18%, p = 0.70 and 0.73% vs 0.64%, p = 0.83, respectively). Six hundred sixty-seven patients (84%) preferred the same-day discharge strategy. Finally, a reduction of 792 bed-days was recorded, resulting in possible financial Health System benefits. CONCLUSIONS Same-day discharge is feasible and safe in the majority of patients referred for CIED implantation. Additionally, same-day discharge is preferred by patients and may reduce procedure-related costs due to significant bed-day reductions.
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Affiliation(s)
- Stefanos Archontakis
- Department of Cardiology, Hippokration General Hospital, 114 VasilisisSofias str, Athens, Greece
| | - Evangelos Oikonomou
- First Cardiology Division, Medical School, Hippokration General Hospital, University of Athens, 114 VasilisisSofias str, Athens, Greece
| | - Konstantinos Sideris
- Department of Cardiology, Hippokration General Hospital, 114 VasilisisSofias str, Athens, Greece
| | - Ageliki Laina
- First Cardiology Division, Medical School, Hippokration General Hospital, University of Athens, 114 VasilisisSofias str, Athens, Greece
| | - Dimitra Tirovola
- Department of Cardiology, Hippokration General Hospital, 114 VasilisisSofias str, Athens, Greece
| | - Dimitra Paraskevopoulou
- Department of Cardiology, Hippokration General Hospital, 114 VasilisisSofias str, Athens, Greece
| | - Panagiotis Kostakis
- Department of Cardiology, Hippokration General Hospital, 114 VasilisisSofias str, Athens, Greece
| | - Ioannis Doundoulakis
- First Cardiology Division, Medical School, Hippokration General Hospital, University of Athens, 114 VasilisisSofias str, Athens, Greece
| | - Petros Arsenos
- First Cardiology Division, Medical School, Hippokration General Hospital, University of Athens, 114 VasilisisSofias str, Athens, Greece
| | - Ioannis Ntalakouras
- First Cardiology Division, Medical School, Hippokration General Hospital, University of Athens, 114 VasilisisSofias str, Athens, Greece
| | - Emmanouil Charitakis
- Department of Cardiology, Hippokration General Hospital, 114 VasilisisSofias str, Athens, Greece
| | - Konstantinos Gatzoulis
- First Cardiology Division, Medical School, Hippokration General Hospital, University of Athens, 114 VasilisisSofias str, Athens, Greece
| | - Konstantinos Tsioufis
- First Cardiology Division, Medical School, Hippokration General Hospital, University of Athens, 114 VasilisisSofias str, Athens, Greece
| | - Skevos Sideris
- Department of Cardiology, Hippokration General Hospital, 114 VasilisisSofias str, Athens, Greece.
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Archontakis S, Oikonomou E, Sideris K, Laina A, Tirovola D, Paraskevopoulou D, Kostakis P, Doundoulakis I, Arsenos P, Ntalakouras I, Charitakis E, Gatzoulis K, Tsioufis K, Sideris S. Correction to: Safety of same-day discharge versus overnight stay strategy following cardiac device implantations: a high-volume single-centre experience. J Interv Card Electrophysiol 2023; 66:483. [PMID: 36542314 PMCID: PMC10074511 DOI: 10.1007/s10840-022-01458-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Stefanos Archontakis
- Department of Cardiology, Hippokration General Hospital, 114 VasilisisSofias str, Athens, Greece
| | - Evangelos Oikonomou
- First Cardiology Division, Medical School, Hippokration General Hospital, University of Athens, 114 VasilisisSofias str, Athens, Greece
| | - Konstantinos Sideris
- Department of Cardiology, Hippokration General Hospital, 114 VasilisisSofias str, Athens, Greece
| | - Ageliki Laina
- First Cardiology Division, Medical School, Hippokration General Hospital, University of Athens, 114 VasilisisSofias str, Athens, Greece
| | - Dimitra Tirovola
- Department of Cardiology, Hippokration General Hospital, 114 VasilisisSofias str, Athens, Greece
| | - Dimitra Paraskevopoulou
- Department of Cardiology, Hippokration General Hospital, 114 VasilisisSofias str, Athens, Greece
| | - Panagiotis Kostakis
- Department of Cardiology, Hippokration General Hospital, 114 VasilisisSofias str, Athens, Greece
| | - Ioannis Doundoulakis
- First Cardiology Division, Medical School, Hippokration General Hospital, University of Athens, 114 VasilisisSofias str, Athens, Greece
| | - Petros Arsenos
- First Cardiology Division, Medical School, Hippokration General Hospital, University of Athens, 114 VasilisisSofias str, Athens, Greece
| | - Ioannis Ntalakouras
- First Cardiology Division, Medical School, Hippokration General Hospital, University of Athens, 114 VasilisisSofias str, Athens, Greece
| | - Emmanouil Charitakis
- Department of Cardiology, Hippokration General Hospital, 114 VasilisisSofias str, Athens, Greece
| | - Konstantinos Gatzoulis
- First Cardiology Division, Medical School, Hippokration General Hospital, University of Athens, 114 VasilisisSofias str, Athens, Greece
| | - Konstantinos Tsioufis
- First Cardiology Division, Medical School, Hippokration General Hospital, University of Athens, 114 VasilisisSofias str, Athens, Greece
| | - Skevos Sideris
- Department of Cardiology, Hippokration General Hospital, 114 VasilisisSofias str, Athens, Greece.
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Paraskevopoulou D, Kaskaoutis DG, Grivas G, Bikkina S, Tsagkaraki M, Vrettou IM, Tavernaraki K, Papoutsidaki K, Stavroulas I, Liakakou E, Bougiatioti A, Oikonomou K, Gerasopoulos E, Mihalopoulos N. Brown carbon absorption and radiative effects under intense residential wood burning conditions in Southeastern Europe: New insights into the abundance and absorptivity of methanol-soluble organic aerosols. Sci Total Environ 2023; 860:160434. [PMID: 36427708 DOI: 10.1016/j.scitotenv.2022.160434] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 11/04/2022] [Accepted: 11/19/2022] [Indexed: 06/16/2023]
Abstract
Biomass burning is a major source of Brown Carbon (BrC), strongly contributing to radiative forcing. In urban areas of the climate-sensitive Southeastern European region, where strong emissions from residential wood burning (RWB) are reported, radiative impacts of carbonaceous aerosols remain largely unknown. This study examines the absorption properties of water- and methanol-soluble organic carbon (WSOC, MeS_OC) in a city (Ioannina, Greece) heavily impacted by RWB. Measurements were performed during winter (December 2019 - February 2020) and summer (July - August 2019) periods, characterized by RWB and photochemical processing of organic aerosol (OA), respectively. PM2.5 filter extracts were analyzed spectrophotometrically for water- and methanol-soluble BrC (WS_BrC, MeS_BrC) absorption. WSOC concentrations were quantified using TOC analysis, while those of MeS_OC were determined using a newly developed direct quantification protocol, applied for the first time to an extended series of ambient samples. The direct method led to a mean MeS_OC/OC of 0.68 and a more accurate subsequent estimation of absorption efficiencies. The mean winter WS_BrC and MeS_BrC absorptions at 365 nm were 13.9 Mm-1 and 21.9 Mm-1, respectively, suggesting an important fraction of water-insoluble OA. Mean winter WS_BrC and MeS_BrC absorptions were over 10 times those observed in summer. MeS_OC was more absorptive than WSOC in winter (mean mass absorption efficiencies - MAE365: 1.81 vs 1.15 m2 gC-1) and especially in summer (MAE: 1.12 vs 0.27 m2 gC-1) due to photo-dissociation and volatilization of BrC chromophores. The winter radiative forcing (RF) of WS_BrC and MeS_BrC relative to elemental carbon (EC) was estimated at 8.7 % and 16.7 %, respectively, in the 300-2500 nm band. However, those values increased to 48.5 % and 60.2 % at 300-400 nm, indicating that, under intense RWB, BrC forcing becomes comparable to that of soot. The results highlight the consideration of urban BrC emissions in radiative transfer models, as a considerable climate forcing factor.
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Affiliation(s)
- D Paraskevopoulou
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, P. Penteli, Athens 15236, Greece.
| | - D G Kaskaoutis
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, P. Penteli, Athens 15236, Greece; Environmental Chemical Processes Laboratory, Department of Chemistry, University of Crete, 70013 Crete, Greece.
| | - G Grivas
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, P. Penteli, Athens 15236, Greece
| | - S Bikkina
- CSIR-National Institute of Oceanography, Dona Paula, Goa 403 004, India
| | - M Tsagkaraki
- Environmental Chemical Processes Laboratory, Department of Chemistry, University of Crete, 70013 Crete, Greece
| | - I M Vrettou
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, P. Penteli, Athens 15236, Greece
| | - K Tavernaraki
- Environmental Chemical Processes Laboratory, Department of Chemistry, University of Crete, 70013 Crete, Greece
| | - K Papoutsidaki
- Environmental Chemical Processes Laboratory, Department of Chemistry, University of Crete, 70013 Crete, Greece
| | - I Stavroulas
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, P. Penteli, Athens 15236, Greece; Environmental Chemical Processes Laboratory, Department of Chemistry, University of Crete, 70013 Crete, Greece; Climate and Atmosphere Research Center, The Cyprus Institute, 2121 Nicosia, Cyprus
| | - E Liakakou
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, P. Penteli, Athens 15236, Greece
| | - A Bougiatioti
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, P. Penteli, Athens 15236, Greece
| | - K Oikonomou
- Climate and Atmosphere Research Center, The Cyprus Institute, 2121 Nicosia, Cyprus
| | - E Gerasopoulos
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, P. Penteli, Athens 15236, Greece
| | - N Mihalopoulos
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, P. Penteli, Athens 15236, Greece; Environmental Chemical Processes Laboratory, Department of Chemistry, University of Crete, 70013 Crete, Greece
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Liakakou E, Kaskaoutis DG, Grivas G, Stavroulas I, Tsagkaraki M, Paraskevopoulou D, Bougiatioti A, Dumka UC, Gerasopoulos E, Mihalopoulos N. Long-term brown carbon spectral characteristics in a Mediterranean city (Athens). Sci Total Environ 2020; 708:135019. [PMID: 31791764 DOI: 10.1016/j.scitotenv.2019.135019] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 10/02/2019] [Accepted: 10/15/2019] [Indexed: 05/19/2023]
Abstract
This study analyses 4-years of continuous 7-λ Aethalometer (AE-33) measurements in an urban-background environment of Athens, to resolve the spectral absorption coefficients (babs) for black carbon (BC) and brown carbon (BrC). An important BrC contribution (23.7 ± 11.6%) to the total babs at 370 nm is estimated for the period May 2015-April 2019, characterized by a remarkable seasonality with winter maximum (33.5 ± 13.6%) and summer minimum (18.5 ± 8.1%), while at longer wavelengths the BrC contribution is significantly reduced (6.8 ± 3.6% at 660 nm). The wavelength dependence of the total babs gives an annual-mean AAE370-880 of 1.31, with higher values in winter night-time. The BrC absorption and its contribution to babs presents a large increase reaching up to 39.1 ± 13.6% during winter nights (370 nm), suggesting residential wood burning (RWB) emissions as a dominant source for BrC. This is supported by strong correlations of the BrC absorption with OC, EC, the fragment ion m/z 60 derived from ACSM and PMF-analyzed organic fractions related to biomass burning (e.g. BBOA). In contrast, BrC absorption decreases significantly during daytime as well as in the warm period, reaching to a minimum during the early-afternoon hours in all seasons due to photo-chemical degradation. Estimated secondary BrC absorption is practically evident only during winter night-time, implying the fast oxidation of BrC species from RWB emissions. Changes in mixing-layer height do not significantly affect the BrC absorption in winter, while they play a major role in summer.
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Affiliation(s)
- E Liakakou
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Palaia Penteli, 15236 Athens, Greece.
| | - D G Kaskaoutis
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Palaia Penteli, 15236 Athens, Greece
| | - G Grivas
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Palaia Penteli, 15236 Athens, Greece
| | - I Stavroulas
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Palaia Penteli, 15236 Athens, Greece
| | - M Tsagkaraki
- Environmental Chemical Processes Laboratory, Department of Chemistry, University of Crete, 71003 Crete, Greece
| | - D Paraskevopoulou
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Palaia Penteli, 15236 Athens, Greece
| | - A Bougiatioti
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Palaia Penteli, 15236 Athens, Greece
| | - U C Dumka
- Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital 263 001, India
| | - E Gerasopoulos
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Palaia Penteli, 15236 Athens, Greece
| | - N Mihalopoulos
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Palaia Penteli, 15236 Athens, Greece; Environmental Chemical Processes Laboratory, Department of Chemistry, University of Crete, 71003 Crete, Greece.
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Paraskevopoulou D, Liakakou E, Gerasopoulos E, Mihalopoulos N. Sources of atmospheric aerosol from long-term measurements (5 years) of chemical composition in Athens, Greece. Sci Total Environ 2015; 527-528:165-178. [PMID: 25958364 DOI: 10.1016/j.scitotenv.2015.04.022] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Revised: 03/31/2015] [Accepted: 04/07/2015] [Indexed: 06/04/2023]
Abstract
To identify the sources of aerosols in Greater Athens Area (GAA), a total of 1510 daily samples of fine (PM 2.5) and coarse (PM 10-2,5) aerosols were collected at a suburban site (Penteli), during a five year period (May 2008-April 2013) corresponding to the period before and during the financial crisis. In addition, aerosol sampling was also conducted in parallel at an urban site (Thissio), during specific, short-term campaigns during all seasons. In all these samples mass and chemical composition measurements were performed, the latest only at the fine fraction. Particulate organic matter (POM) and ionic masses (IM) are the main contributors of aerosol mass, equally contributing by accounting for about 24% of the fine aerosol mass. In the IM, nss-SO4(-2) is the prevailing specie followed by NO3(-) and NH4(+) and shows a decreasing trend during the 2008-2013 period similar to that observed for PM masses. The contribution of water in fine aerosol is equally significant (21 ± 2%), while during dust transport, the contribution of dust increases from 7 ± 2% to 31 ± 9%. Source apportionment (PCA and PMF) and mass closure exercises identified the presence of six sources of fine aerosols: secondary photochemistry, primary combustion, soil, biomass burning, sea salt and traffic. Finally, from winter 2012 to winter 2013 the contribution of POM to the urban aerosol mass is increased by almost 30%, reflecting the impact of wood combustion (dominant fuel for domestic heating) to air quality in Athens, which massively started in winter 2013.
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Affiliation(s)
- D Paraskevopoulou
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, I. Metaxa and Vas. Pavlou, 15236, P. Penteli, Athens, Greece; Environmental Chemical Processes laboratory (ECPL), Department of Chemistry, University of Crete, P.O. Box 2208, 71003 Heraklion, Greece
| | - E Liakakou
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, I. Metaxa and Vas. Pavlou, 15236, P. Penteli, Athens, Greece
| | - E Gerasopoulos
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, I. Metaxa and Vas. Pavlou, 15236, P. Penteli, Athens, Greece
| | - N Mihalopoulos
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, I. Metaxa and Vas. Pavlou, 15236, P. Penteli, Athens, Greece; Environmental Chemical Processes laboratory (ECPL), Department of Chemistry, University of Crete, P.O. Box 2208, 71003 Heraklion, Greece.
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Paraskevopoulou D, Boskou D, Paraskevopoulou A. Oxidative stability of olive oil–lemon juice salad dressings stabilized with polysaccharides. Food Chem 2007. [DOI: 10.1016/j.foodchem.2006.03.022] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [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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Paraskevopoulou D. Dora's story. Dora Paraskevopoulou, president of the Hellenic Society of Mastectomy, Greece. Eur J Cancer Care (Engl) 1996; 5:4. [PMID: 8715515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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