S. Arcasoy and R. Kotloff, Lung Transplantation, New England Journal of Medicine, vol.340, issue.14, pp.1081-91, 1999.
DOI : 10.1056/NEJM199904083401406

E. Trulock, Lung transplantation., American Journal of Respiratory and Critical Care Medicine, vol.155, issue.3, pp.789-818, 1997.
DOI : 10.1164/ajrccm.155.3.9117010

E. Trulock, L. Edwards, D. Taylor, M. Boucek, B. Keck et al., Registry of the International Society for Heart and Lung Transplantation: Twenty-third Official Adult Lung and Heart???Lung Transplantation Report???2006, The Journal of Heart and Lung Transplantation, vol.25, issue.8, pp.880-92, 2006.
DOI : 10.1016/j.healun.2006.06.001

J. Cooper, G. Patterson, R. Grossman, and J. Maurer, Double-Lung Transplant for Advanced Chronic Obstructive Lung Disease, American Review of Respiratory Disease, vol.139, issue.2, pp.303-310, 1989.
DOI : 10.1164/ajrccm/139.2.303

S. Levine, A. Anzueto, J. Peters, T. Cronin, E. Sako et al., Medium term functional results of single-lung transplantation for endstage obstructive lung disease., American Journal of Respiratory and Critical Care Medicine, vol.150, issue.2
DOI : 10.1164/ajrccm.150.2.8049821

H. Mal, C. Sleiman, G. Jebrak, O. Messian, F. Dubois et al., Functional results of single-lung transplantation for chronic obstructive lung disease., American Journal of Respiratory and Critical Care Medicine, vol.149, issue.6, pp.1476-81, 1994.
DOI : 10.1164/ajrccm.149.6.8004301

P. Corris, Lung transplantation for chronic obstructive pulmonary disease: an exercise in quality rather than quantity?, Thorax, vol.54, issue.Supplement 2, pp.24-31, 1999.
DOI : 10.1136/thx.54.2008.S24

G. Snell, Chronic obstructive pulmonary disease outcomes: can we now compare apples with apples?, Internal Medicine Journal, vol.17, issue.1, pp.3-4, 2006.
DOI : 10.1378/chest.127.6.1904

D. Weill, S. Keshavjee, A. Frost, C. Keller, G. Noon et al., Lung transplantation for emphysema: two lungs or one Outcome of the native lung after single lung transplant, J Heart Lung Transplant. Multiorgan Transplant Group. Chest, vol.20107, issue.134, pp.739-42981, 1995.

H. Mal, O. Brugiere, C. Sleiman, I. Rullon, G. Jebrak et al., Morbidity and mortality related to the native lung in single lung transplantation for emphysema, The Journal of Heart and Lung Transplantation, vol.19, issue.2, pp.220-223, 2000.
DOI : 10.1016/S1053-2498(99)00130-8

T. Williams, G. Patterson, P. Mcclean, N. Zamel, and J. Maurer, Maximal Exercise Testing in Single and Double Lung Transplant Recipients, American Review of Respiratory Disease, vol.145, issue.1, 1992.
DOI : 10.1164/ajrccm/145.1.101

A. Gunes, C. Aboyoun, J. Morton, M. Plit, M. Malouf et al., 1663-9; discussion 9-70. 18 Lung transplantation for chronic obstructive pulmonary disease at St Vincent's Hospital, Intern Med J, vol.7436, issue.51, pp.5-11, 2006.

D. Meyer, L. Bennett, R. Novick, and J. Hosenpud, Single vs bilateral, sequential lung transplantation for end-stage emphysema: influence of recipient age on survival and secondary end-points, The Journal of Heart and Lung Transplantation, vol.20, issue.9, pp.935-976, 2001.
DOI : 10.1016/S1053-2498(01)00295-9

M. Mamdani, K. Sykora, P. Li, S. Normand, D. Streiner et al., Reader's guide to critical appraisal of cohort studies: 2. Assessing potential for confounding, BMJ, vol.330, issue.7497, 2005.
DOI : 10.1136/bmj.330.7497.960

T. Raghunathan, J. Lepkowski, J. Van-hoewyk, and P. Solenberger, A multivariate technique for multiply imputing missing values using a sequence of regression models, Surv Methodol, vol.27, pp.85-95, 2001.

D. Rubin and N. Schenker, Multiple imputation in health-are databases: An overview and some applications, Statistics in Medicine, vol.4, issue.4, pp.585-598, 1991.
DOI : 10.1002/sim.4780100410

R. Little and D. Rubin, Statistical analysis with missing data, 1987.
DOI : 10.1002/9781119013563