1. Chronic obstructive pulmonary disease: molecular and cellular mechanisms;Barnes;Eur Respir J,2003
2. The global burden of disease, 1990-2020;Lopez;Nat Med,1998
3. The tobacco atlas;Mackay,2006
4. Standards for the diagnosis and care of patients with chronic obstructive pulmonary disease. American Thoracic Society;Am J Respir Crit Care Med,1995
5. Chronic obstructive pulmonary disease;Barnes;N Engl J Med,2000