title: [Epidemiological studies of chronic bronchitis in two regions without industrial air-pollution].
mesh_terms: D000328:Adult; D000367:Age Factors; D000397:Air Pollution; D001991:Bronchitis / Q000453:epidemiology* / Q000209:etiology; D002908:Chronic Disease; D002980:Climate; D006801:Humans; D007220:Industrial Waste; D012130:Respiratory Hypersensitivity / Q000150:complications; D012141:Respiratory Tract Infections / Q000150:complications; D012383:Romania; D012424:Rural Population; D012907:Smoking / Q000150:complications
chemical_list: D007220:Industrial Waste
vernacular_title: Cercetări epidemiologice asupra bronşitei cronice în două zone fără poluare atmosferică industrială.