1) Global Initiative for Chronic Obstructive Lung Disease. Global strategy for diagnosis, management, and prevention of COPD. (http://www.goldcopd.oreguidelines-global-strategy-for-diagnosis-management.html)
3) Fletcher C, Peto R : The natural history of chronic airflow obstruction. Br Med J 1977 ; 1 : 1645-1648
4) Vestbo J, Edwards LD, Scanlon PD et al : Changes in forced expiratory volume in 1 second over time in COPD. N Engl J Med 2011 ; 365 : 1184-1192
5) Mannino DM, Doherty DE, Sonia Buist A : Global initiative on Obstructive Lung disease (GOLD) classification of lung disease and mortality : findings from the Atherosclerosis Risk in Communities (ARIC) study. Respir Med 2006 ; 100 : 115-122