title: Clubbing should not be attributed to COPD.
authors.forename: Christopher R
authors.initials: CR
authors.lastname: Foerster
mesh_terms: D006801:Humans; D010005:Osteoarthropathy, Secondary Hypertrophic / Q000209:etiology*; D029424:Pulmonary Disease, Chronic Obstructive / Q000150:complications*