title: Patient information series.  Chronic obstructive pulmonary disease (COPD).
mesh_terms: D029481:Bronchitis, Chronic / Q000175:diagnosis; D006801:Humans; D010353:Patient Education as Topic; D029424:Pulmonary Disease, Chronic Obstructive / Q000175:diagnosis / Q000628:therapy; D011656:Pulmonary Emphysema / Q000175:diagnosis