1. BTS Guidelines for the management of chronic obstructive pulmonary disease;Thorax,1997
2. Global strategy for the diagnosis, management, and prevention of chronic obstructive pulmonary disease: National Heart Lung, and Blood Institute and World Health Organization Global Initiative for Chronic Obstructive Lung Disease (GOLD): executive summary;Pauwels;Am J Respir Crit Care Med,2001
3. Murray CJL, Lopez AD. Alternative visions of the future: projecting mortality and disability, 1990–2020. In: Murray CJL, Lopez, AD, editors. The global burden of disease. The Harvard School of Public Health, on behalf of the World Health Organization and the World Bank; 1996. p. 361–95.
4. Epidedmiological aspects and early detection of chronic obstructive pulmonary disease among elderly;Lundbäck;Eur Respir J,2003
5. The global burden and impact of chronic obstructive pulmonary disease worldwide;Gulsvik;Monaldi Arch Chest Dis,2001