[Epidemiology of bronchial asthma in a population of 170,000 in South China].
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001249:Asthma / Q000145:classification / Q000453:epidemiology* / Q000235:genetics; D002648:Child; D002681:China; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012621:Seasons