title: Long-term maintenance and preventive pharmacologic therapy for asthma.
mesh_terms: D000293:Adolescent; D001249:Asthma / Q000188:drug therapy* / Q000517:prevention & control; D002648:Child; D002675:Child, Preschool; D004334:Drug Administration Schedule; D006801:Humans; D007223:Infant; D011788:Quality of Life; D013997:Time Factors