1. Global Initiative for Chronic Obstructive Lung Disease. Global Strategy for the Diagnosis, Management, and Prevention of Chronic Obstructive Pulmonary Disease, 2003. Available at: http://www.goldcopd.com. Accessed June 23, 2004.
2. Chronic Obstructive Pulmonary Disease Data Fact Sheet, 2003,2003
3. Alternative projections of mortality and disability by cause 1990–2020;Murray;Lancet.,1997
4. Asthma in the elderly;Braman;Clin Geriatr Med.,2003
5. Gender bias in the diagnosis of COPD;Chapman;Chest.,2001