title: Early diagnosis of COPD.
authors.forename: T L
authors.initials: TL
authors.lastname: Petty
mesh_terms: D006801:Humans; D008173:Lung Diseases, Obstructive / Q000175:diagnosis* / Q000453:epidemiology; D009749:Nutrition Surveys; D016540:Smoking Cessation; D013147:Spirometry; D014481:United States / Q000453:epidemiology