title: Chronic obstructive pulmonary disease.
authors: National Heart and Lung Institute, Imperial College, Dovehouse Street, London, SW3 6LY, UK. Electronic address: p.j.barnes@imperial.ac.uk.
authors: Peter J
authors: PJ
authors: Barnes
mesh_terms: D000368:Aged; D006801:Humans; D029424:Pulmonary Disease, Chronic Obstructive / Q000209:etiology; D012907:Smoking / Q000009:adverse effects