Underdiagnosis of childhood asthma.
D000293:Adolescent; D001249:Asthma / Q000175:diagnosis* / Q000235:genetics / Q000517:prevention & control; D002648:Child; D002675:Child, Preschool; D004205:Cromolyn Sodium / Q000627:therapeutic use; D006801:Humans; D007223:Infant; D007231:Infant, Newborn
D004205:Cromolyn Sodium