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Tavazzi L, Swedberg K, Komajda M, Böhm M, Borer JS, Lainscak M, Robertson M, Ford I. Clinical profiles and outcomes in patients with chronic heart failure and chronic obstructive pulmonary disease: an efficacy and safety analysis of SHIFT study. Int J Cardiol 2013; 170:182-8. [PMID: 24225201 DOI: 10.1016/j.ijcard.2013.10.068] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Revised: 09/27/2013] [Accepted: 10/19/2013] [Indexed: 12/11/2022]
Abstract
BACKGROUND Heart failure (HF) and chronic obstructive pulmonary disease (COPD) frequently coexist, with undefined prognostic and therapeutic implications. We investigated clinical profile and outcomes of patients with chronic HF and COPD, notably the efficacy and safety of ivabradine, a heart rate-reducing agent. METHODS 6505 ambulatory patients, in sinus rhythm, heart rate ≥ 70 bpm and stable systolic HF were randomised to placebo or ivabradine (2.5 to 7.5mg bid). Multivariate Cox model analyses were performed to compare the COPD (n=730) and non-COPD subgroups, and the ivabradine and placebo treatment effects. RESULTS COPD patients were older and had a poorer risk profile. Beta-blockers were prescribed to 69% of COPD patients and 92% of non-COPD patients. The primary endpoint (PEP) and its component, hospitalisation for worsening HF, were more frequent in COPD patients (HRs f, 1.22 [p=0.006]; and 1.34 [p<0.001]) respectively, but relative risk was reduced similarly by ivabradine in both COPD (14%, and 17%) and non-COPD (18% and 27%) patients (p interaction=0.82, and 0.53, respectively). Similar effect was noted also for cardiovascular death. Adverse events were more common in COPD patients, but similar in treatment subgroups. Bradycardia occurred more frequently in ivabradine subgroups, with similar incidence in patients with or without COPD. CONCLUSIONS The association of COPD and HF results in a worse prognosis, and COPD represents a barrier to optimisation of beta-blocker therapy. Ivabradine is similarly effective and safe in chronic HF patients with or without COPD, and can be safely combined with beta-blockers in COPD.
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O'Neill FG, Robertson M, Summerbell K, Breen M, Robinson LA. The mobilisation of sediment and benthic infauna by scallop dredges. MARINE ENVIRONMENTAL RESEARCH 2013; 90:104-112. [PMID: 23871519 DOI: 10.1016/j.marenvres.2013.06.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Revised: 06/20/2013] [Accepted: 06/22/2013] [Indexed: 06/02/2023]
Abstract
We present the results of experiments to assess the immediate impact of scallop dredging on the seabed sediment and on the inhabiting infauna. The passage of the scallop dredge is shown to homogenise the seabed, flattening sand ripples. The turbulent wake entrains up to the equivalent of a 1 mm layer of sediment per unit of swept width, although an analysis of the finer particles material implies that the suspended silt material must originate from depths of at least 10 mm. The species most abundant in the sediment plume either swim actively in the water column or are found in, or on, the upper layers of the substrate, whereas those most abundant in core samples taken from the sediment, but not present in the net samples, are almost all tube-building or deep burrowing. The vertical stratification of sediment concentration and of animal numbers in the water column suggests that even if some of these species respond actively to the presence of the dredge, once entrained, they are transported more or less passively in the same way as the larger sediment particles. There was no difference between the core samples taken before or after towing suggesting that animals mobilised by the dredge resettle in the tow path. Our analysis does not provide any information regarding the fate of these animals.
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Voors AA, Van Veldhuisen DJ, Robertson M, Ford I, Borer J, Boehm M, Komajda M, Swedberg K, Tavazzi L. The effect of heart rate reduction with ivabradine on renal function in patients with chronic heart failure: an analysis from SHIFT. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.810] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Komajda M, Bohm M, Borer J, Ford I, Robertson M, Manolis A, Tavazzi L, Swedberg K. Efficacy and safety of ivabradine in patients with chronic systolic heart failure and low blood pressure in the shift trial. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p3285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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55
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Tavazzi L, Swedberg K, Komajda M, Boehm M, Borer JS, Lainscak M, Robertson M, Ford I. Clinical profiles and outcomes of patients with chronic heart failure and chronic obstructive pulmonary disease: efficacy and safety of Ivabradine. a SHIFT study analysis. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.3556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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56
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Ford I, Robertson M, Borer J, Bohm M, Komajda M, Tavazzi L, Swedberg K. The top ten factors related to morbidity and mortality in patients with chronic heart failure and LVSD: a SHIFT prognostic model. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.p1487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Jordan LVM, Robertson M, Grant L, Peters REL, Cameron JT, Chisholm S, Voigt DJ, Matheson L, Kerr EJ, Maclean K, Macalpine RR, Wilson E, Mackie ADR, Summers NM, Vadiveloo T, Leese GP. The Tayside insulin management course: an effective education programme in type 1 diabetes. Int J Clin Pract 2013; 67:462-8. [PMID: 23510057 DOI: 10.1111/ijcp.12107] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Accepted: 12/01/2012] [Indexed: 12/19/2022] Open
Abstract
AIMS The Tayside insulin management (TIM) course is an intensive insulin management programme for adults with type 1 diabetes. The aim was to assess its effectiveness. METHODS Haemoglobin A1c (HbA1c) and body mass index (BMI) from individuals with type 1 diabetes were collected 3 months before, and 6 and 24 months after the programme. The programme involved a full day of education per week for 4 weeks in a row. Quality of life was assessed using the standardised Audit of Diabetes-Dependent Quality of Life (ADDQoL) questionnaire completed both before and 3 months after the course. Subjects were also asked to complete a pre- and postcourse questionnaire gathering information about aspects of their diabetes management. In addition, individual satisfaction with course content and delivery was recorded. RESULTS Participants had a median reduction in haemoglobin A1c (HbA1c) of 4 mmol/mol (0.4%) after 6 months and 5 mmol/mol (0.5%) 2 years after the course (p < 0.001). Mean daily dose of short-acting insulin decreased from 31.5 (1.9) units to 27.3 (1.9, p < 0.001). There was no significant change in BMI. There was an improvement in all 18 domains of the ADDQoL questionnaire. There was a decrease in hypoglycaemia unawareness from 34.3 ± 47.8% of patients to 8.6 ± 28% (p < 0.001), and a decrease in self-reported lipohypertrophy from 27.8% to 11.1% (p = 0.001). There was a significant reduction in the mean number of diabetic ketoacidosis and severe hypoglycaemic episodes. The number of blood glucose checks changed from 2.8 ± 2.1 to 3.2 ± 1.1 (p = 0.058) per day. Participant satisfaction with all aspects of course content and delivery was high. CONCLUSIONS TIM is an effective intensive education programme for patients with type 1 diabetes.
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Robertson M. Open questions in biology - a tenth anniversary series. BMC Biol 2013; 11:7. [PMID: 23369191 PMCID: PMC3561168 DOI: 10.1186/1741-7007-11-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Accepted: 01/29/2013] [Indexed: 11/30/2022] Open
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McLauchlan D, Robertson M, Drage NP. SUNCT: A NOVEL THERAPEUTIC APPROACH. J Neurol Psychiatry 2012. [DOI: 10.1136/jnnp-2012-304200a.26] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Jayaraman V, Cole G, Robertson M, Burgner C, John D, Uddin A, Cable A. Rapidly swept, ultra-widely-tunable 1060 nm MEMS-VCSELs. ELECTRONICS LETTERS 2012; 48:1331-1333. [PMID: 23520409 PMCID: PMC3601947 DOI: 10.1049/el.2012.3180] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Demonstrated are 1060 nm microelectromechanical-systems-based tunable vertical-cavity surface-emitting lasers (MEMS-VCSELs) with a 100 nm continuous tuning range under repetitively scanned operation at rates beyond 500 kHz and a 90 nm continuous tuning range under static operation. These devices employ a thin strained InGaAs multiple quantum well active region integrated with a fully oxidised GaAs/AlxOy bottom mirror and a suspended dielectric top mirror. The devices are optically pumped via 850 nm light. These ultra-widely tunable lasers represent the first MEMS-VCSELs reported in this wavelength range, and are ideally suited for application in ophthalmic swept-source optical coherence tomography.
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Goff B, Lowe K, Kane J, Robertson M, Gaul M, Andersen M. The safety of symptom based screening for ovarian cancer. Gynecol Oncol 2012. [DOI: 10.1016/j.ygyno.2012.07.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Robertson M. What is wrong with this picture? BMC Biol 2012; 10:76. [PMID: 22943281 PMCID: PMC3432620 DOI: 10.1186/1741-7007-10-76] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Accepted: 09/03/2012] [Indexed: 11/10/2022] Open
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Jayaraman V, Cole GD, Robertson M, Uddin A, Cable A. High-sweep-rate 1310 nm MEMS-VCSEL with 150 nm continuous tuning range. ELECTRONICS LETTERS 2012; 48:867-869. [PMID: 23976788 PMCID: PMC3749789 DOI: 10.1049/el.2012.1552] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Microelectromechanical-systems-based vertical-cavity surface-emitting lasers (MEMS-VCSELs) capable of a 150 nm continuous tuning range near 1310 nm are demonstrated. These devices employ a thin optically pumped active region structure with large free-spectral range, which promotes wide and continuous tuning. To achieve VCSEL emission at 1310 nm, a wide-gain-bandwidth indium phosphide-based multiple quantum well active region is combined with a wide-bandwidth fully oxidised GaAs-based mirror through wafer bonding, with tuning enabled by a suspended dielectric top mirror. These devices are capable of being scanned over the entire tuning range at frequencies up to 500 kHz, making them ideal for applications such as swept source optical coherence tomography and high-speed transient spectroscopy.
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Bunn TL, Slavova S, Robertson M. Crash and burn? Vehicle, collision, and driver factors that influence motor vehicle collision fires. ACCIDENT; ANALYSIS AND PREVENTION 2012; 47:140-145. [PMID: 22405242 DOI: 10.1016/j.aap.2011.10.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2011] [Revised: 08/24/2011] [Accepted: 10/01/2011] [Indexed: 05/31/2023]
Abstract
A retrospective population-based case-control study was performed to determine the association between vehicle fires, and vehicle, collision, and driver factors on highways with a posted speed limit of at least 55mph. Data were obtained from the Kentucky Collision Report Analysis for Safer Highways (CRASH) electronic files for 2000-2009 from the Kentucky State Police Records Sections. The results from the final multiple logistic regression show that large trucks were at a higher risk for a collision involving a fire than passenger vehicles and pickup trucks. When controlling for all other variables in the model, vehicles 6 years old and older, driving straight down the highway, and single vehicle collisions were also identified as factors that increase the risk of motor vehicle collision fires on roadways with a posted speed limit of ≥55mph. Of the 2096 vehicles that caught fire, there were 632 (30%) non-fatally injured drivers and 224 (11%) fatally injured drivers. The results of this study have the potential to inform public health messages directed to the transportation industry, particularly semi truck drivers, in regard to fire risk.
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Scharf J, Yu D, Mathews C, Neale B, Stewart E, Fagerness J, Evans P, Gamazon E, Service S, Osiecki L, Illmann C, Cath D, King R, Dion Y, Sandor P, Barr C, Budman C, Lyon G, Grados M, Singer H, Jankovic J, Gilbert D, Hoekstra P, Heiman G, Tischfield J, State M, Robertson M, Kurlan R, Ophoff R, Gibbs JR, Cookson M, Hardy J, Singleton A, Ruiz-Linares A, Rouleau G, Heutink P, Oostra B, McMahon W, Freimer N, COX N, Pauls D. Genome-Wide Association Study of Gilles de la Tourette Syndrome (IN10-1.002). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.in10-1.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Scharf J, Yu D, Mathews C, Neale B, Stewart E, Fagerness J, Evans P, Gamazon E, Service S, Osiecki L, Illmann C, Cath D, King R, Dion Y, Sandor P, Barr C, Budman C, Lyon G, Grados M, Singer H, Jankovic J, Gilbert D, Hoekstra P, Heiman G, Tischfield J, State M, Robertson M, Kurlan R, Ophoff R, Gibbs JR, Cookson M, Hardy J, Singleton A, Ruiz-Linares A, Rouleau G, Heutink P, Oostra B, McMahon W, Freimer N, COX N, Pauls D. Genome-Wide Association Study of Gilles de la Tourette Syndrome (S32.006). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.s32.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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68
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Robertson M, Vink P. Examining new ways of office work between the Netherlands and the USA. ACTA ACUST UNITED AC 2012; 41 Suppl 1:5086-90. [DOI: 10.3233/wor-2012-1042-5086] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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69
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Darbari S, Shahmohammadi M, Mortazavi M, Mohajerzadeh S, Abdi Y, Robertson M, Morrison T. High performance multilayered nano-crystalline silicon/silicon-oxide light-emitting diodes on glass substrates. NANOTECHNOLOGY 2011; 22:375204. [PMID: 21860083 DOI: 10.1088/0957-4484/22/37/375204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A low-temperature hydrogenation-assisted sequential deposition and crystallization technique is reported for the preparation of nano-scale silicon quantum dots suitable for light-emitting applications. Radio-frequency plasma-enhanced deposition was used to realize multiple layers of nano-crystalline silicon while reactive ion etching was employed to create nano-scale features. The physical characteristics of the films prepared using different plasma conditions were investigated using scanning electron microscopy, transmission electron microscopy, room temperature photoluminescence and infrared spectroscopy. The formation of multilayered structures improved the photon-emission properties as observed by photoluminescence and a thin layer of silicon oxy-nitride was then used for electrical isolation between adjacent silicon layers. The preparation of light-emitting diodes directly on glass substrates has been demonstrated and the electroluminescence spectrum has been measured.
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Abstract
Background: The referral letter is an often-overlooked yet essential element that contributes to the quality of patient care when specialist services are accessed. In the field of maternal-fetal medicine, incomplete referral letters that fail to comprehensively identify pregnancy risk factors can have significant implications for pregnancy management and delivery planning. Objectives: To evaluate the quality and completeness of referral letters from general practitioners and obstetricians to the Fetal Medicine Unit (FMU) at The Canberra Hospital and to improve practice through validation of a patient questionnaire with sensitivity for identifying pregnancy risk factors. Methods: Self reported information from a questionnaire completed by pregnant women presenting for initial consultation to the FMU was compared with information contained in the written referral letter for that particular patient. Information compared was categorised as mandatory referral information, significant past obstetric or gynaecological history, or other relevant medical history. Results: The patient questionnaire was successful in providing clinicians with relevant medical information in addition to that which was contained in professional referrals in 57% (95% confidence interval (CI) 48-67%) of cases. Significantly more risk factors for the current pregnancy were highlighted in the questionnaires than in the referral letters (P = 0.008). Conclusions: A significant proportion of referral letters received by the FMU during the study period lacked completeness in many key areas. Recommendations to improve this situation include the routine use of patient questionnaires or referral letter templates, the development of local referral guidelines, and regular clinician education.
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Fitzgerald DW, Janes H, Robertson M, Coombs R, Frank I, Gilbert P, Loufty M, Mehrotra D, Duerr A. An Ad5-vectored HIV-1 vaccine elicits cell-mediated immunity but does not affect disease progression in HIV-1-infected male subjects: results from a randomized placebo-controlled trial (the Step study). J Infect Dis 2011; 203:765-72. [PMID: 21343146 DOI: 10.1093/infdis/jiq114] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The Step study was a randomized trial to determine whether an adenovirus type 5 (Ad5) vector vaccine, which elicits T cell immunity, can lead to control of human immunodeficiency virus (HIV) replication in participants who became HIV-infected after vaccination. METHODS We evaluated the effect of the vaccine on trends in HIV viral load, CD4+ T cell counts, time to initiation of antiretroviral therapy (ART), and AIDS-free survival in 87 male participants who became infected with HIV during the Step study and who had a median of 24 months of post-infection follow-up. RESULTS There was no overall effect of vaccine on mean log(10) viral load (estimated difference between groups, -0.11; P = .47). In a subset of subjects with protective HLA types (B27, B57, B58), mean HIV-1 RNA level over time was lower among vaccine recipients. There was no significant difference in CD4+ T cell counts, time to ART initiation, or in AIDS-free survival between HIV-1-infected subjects who received vaccine versus those who received placebo. CONCLUSIONS HIV RNA levels, CD4+ T cell counts, time to initiation of ART, and AIDS-free survival were similar in vaccine and placebo recipients. There may have been a favorable effect of vaccine on HIV-1 RNA levels in participants with HLA types associated with better control of HIV-1.
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Goff B, Lowe K, Kane J, Robertson M, Gaul M, Andersen M. Symptom-triggered screening for ovarian cancer: A pilot study of feasibility and acceptability. Gynecol Oncol 2011. [DOI: 10.1016/j.ygyno.2010.12.189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Ceconi C, Freedman S, Tardif J, Hildebrandt P, McDonagh T, Gueret P, Parrinello G, Robertson M, Steg P, Tendera M, Ford I, Fox K, Ferrari R. Effect of heart rate reduction by ivabradine on left ventricular remodeling in the echocardiographic substudy of BEAUTIFUL. Int J Cardiol 2011; 146:408-14. [DOI: 10.1016/j.ijcard.2010.10.125] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2010] [Accepted: 10/29/2010] [Indexed: 10/18/2022]
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