title: [Contribution of the epidemiologic method to the study of chronic bronchitis].
mesh_terms: D001991:Bronchitis / Q000453:epidemiology*; D002908:Chronic Disease; D004812:Epidemiologic Methods; D006801:Humans; D012107:Research Design
vernacular_title: Apport de la méthode épidémiologique dans la connaissance des bronchites chroniques.