title: A comparative study of betamethasone valerate aerosol and sodium cromoglycate in children with severe asthma.
mesh_terms: D000293:Adolescent; D000336:Aerosols; D001249:Asthma / Q000188:drug therapy*; D001623:Betamethasone / Q000031:analogs & derivatives*; D001624:Betamethasone Valerate / Q000008:administration & dosage* / Q000627:therapeutic use; D002648:Child; D004205:Cromolyn Sodium / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D008297:Male; D010366:Peak Expiratory Flow Rate
chemical_list: D000336:Aerosols; D001623:Betamethasone; D001624:Betamethasone Valerate; D004205:Cromolyn Sodium