title: The hidden epidemic: chronic obstructive pulmonary disease.
authors.forename: D A
authors.initials: DA
authors.lastname: Enarson
mesh_terms: D006801:Humans; D010819:Physician's Role; D029424:Pulmonary Disease, Chronic Obstructive / Q000175:diagnosis / Q000209:etiology / Q000517:prevention & control*; D012907:Smoking / Q000009:adverse effects