title: Childhood asthma, response to oral prophylaxis.
mesh_terms: D000293:Adolescent; D001249:Asthma / Q000517:prevention & control*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007665:Ketotifen / Q000627:therapeutic use*; D008297:Male; D011446:Prospective Studies
chemical_list: D007665:Ketotifen