title: Chronic obstructive pulmonary disease.
mesh_terms: D006801:Humans; D008173:Lung Diseases, Obstructive / Q000209:etiology / Q000503:physiopathology / Q000628:therapy; D008297:Male; D008875:Middle Aged; D011030:Pneumothorax / Q000209:etiology; D011655:Pulmonary Embolism / Q000209:etiology