3John F.Murray,Thomas L.Petty.Frontline Treatment of COPD-A Monograph for Primary Care Physicians.Snowdrift Pulmonary Conference,New Tersey:Nonprofit Corporation.1996.9-11.
7Majo J, Ghezzo H, Cosio MG. Lymphocyte population and apoptosis in the lungs of smokers and their relation to emphysema. Eur Respir J, 2001,17 : 946-953.
8Kemeny DM, Vyas B, Vukmanovic-Stejic M, et al. CD8^+ T cell subsets and chronic obstructive pulmonary disease. AMJ Respir Crit Care Med, 1999,160:33-37.
10Global Initiative for Chronic Obstructive Lung Disease. Global strategy for the diagnosis, management, and prevention of chronic obstructive pulmonary disease (2015) [ EB/OL]. http:// www.goldcood.org/.