title: Clinical importance of the Step 3 choice in asthma.
authors.forename: M L
authors.initials: ML
authors.lastname: Barnes
authors.forename: B J
authors.initials: BJ
authors.lastname: Lipworth
mesh_terms: D000280:Administration, Inhalation; D000305:Adrenal Cortex Hormones / Q000008:administration & dosage*; D000318:Adrenergic beta-Agonists / Q000008:administration & dosage*; D001249:Asthma / Q000188:drug therapy*; D040261:Harm Reduction; D006801:Humans; D016032:Randomized Controlled Trials as Topic
chemical_list: D000305:Adrenal Cortex Hormones; D000318:Adrenergic beta-Agonists