A five-year prospective survey of rural children with asthma and hay fever.
D000293:Adolescent; D000328:Adult; D000375:Aging; D001249:Asthma / Q000453:epidemiology*; D002648:Child; D002675:Child, Preschool; D005500:Follow-Up Studies; D006801:Humans; D007484:Iowa; D011446:Prospective Studies; D006255:Rhinitis, Allergic, Seasonal / Q000453:epidemiology*; D012424:Rural Population; D012882:Skin Tests; D013997:Time Factors