title: Step 3 of the asthma guidelines.
authors.forename: A E
authors.initials: AE
authors.lastname: Tattersfield
authors.forename: T W
authors.initials: TW
authors.lastname: Harrison
mesh_terms: D018927:Anti-Asthmatic Agents / Q000627:therapeutic use; D001249:Asthma / Q000188:drug therapy*; D006801:Humans; D017410:Practice Guidelines as Topic; D016032:Randomized Controlled Trials as Topic; D016896:Treatment Outcome; D006113:United Kingdom
chemical_list: D018927:Anti-Asthmatic Agents