title: [Prospective epidemiological study of chronic bronchitis in a group of chemical-industry workers].
mesh_terms: D000328:Adult; D001991:Bronchitis / Q000453:epidemiology*; D002617:Chemical Industry; D002908:Chronic Disease; D006801:Humans; D008297:Male; D008875:Middle Aged; D009784:Occupational Diseases / Q000453:epidemiology*; D011044:Poland; D012907:Smoking / Q000150:complications
vernacular_title: Studio epidemiologico prospettivo sulla bronchite cronica in un gruppo di operai di una fabbrica chimica.