Respiratory symptoms in adolescents and childhood respiratory history. Results on 15,000 adolescents.
D000293:Adolescent; D000367:Age Factors; D001991:Bronchitis / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D003371:Cough / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D011014:Pneumonia / Q000453:epidemiology; D012120:Respiration Disorders / Q000453:epidemiology*