The changing prevalence of asthma in school children.
D000293:Adolescent; D000367:Age Factors; D044466:Asian People; D001249:Asthma / Q000453:epidemiology*; D044383:Black People; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D012737:Sex Factors; D006113:United Kingdom; D044465:White People