Increasing prevalence of asthma in children.
D000293:Adolescent; D001249:Asthma / Q000453:epidemiology* / Q000235:genetics; D002648:Child; D005260:Female; D006801:Humans; D006967:Hypersensitivity / Q000453:epidemiology / Q000235:genetics; D008297:Male; D009520:New Zealand