The significance of the age of onset of asthma.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001249:Asthma / Q000175:diagnosis / Q000453:epidemiology* / Q000209:etiology; D001315:Australia; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D006967:Hypersensitivity; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012737:Sex Factors