1. New concepts in chronic obstructive pulmonary disease;Barnes;Annu Rev Med,2003
2. Chronic obstructive bronchopulmonary disease. I. clinical features;Mitchell;Am Rev Respir Dis,1964
3. Aspects on pathophysiological mechanisms in COPD;Larsson;J Intern Med,2007
4. Definition, epidemiology and natural history of COPD;Viegi;Eur Respir J,2007
5. Chronic obstructive pulmonary disease: definition and epidemiology;Mannino;Respir Care,2003