[Chronic bronchitis and emphysema in the USA].
D001991:Bronchitis / Q000453:epidemiology*; D002908:Chronic Disease; D004646:Emphysema / Q000453:epidemiology*; D006801:Humans; D009784:Occupational Diseases / Q000453:epidemiology*; D014481:United States; D014942:Workers' Compensation
Chronische Bronchitis und Emphysem in den USA.