[Natural history of chronic bronchitis. 4-year follow-up in a school-age population].
D000367:Age Factors; D000402:Airway Obstruction / Q000453:epidemiology; D001991:Bronchitis / Q000453:epidemiology* / Q000503:physiopathology; D002648:Child; D002908:Chronic Disease; D004787:Environmental Pollution; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D011174:Portugal; D012737:Sex Factors
L'histoire naturelle de la bronchite chronique. "Follow up" pendant quatre ans dans une population d'âge scolaire.