title: The step 3 dilemma for moderate persistent asthma.
authors.forename: Brian J
authors.initials: BJ
authors.lastname: Lipworth
mesh_terms: D018927:Anti-Asthmatic Agents / Q000008:administration & dosage*; D001249:Asthma / Q000188:drug therapy* / Q000503:physiopathology; D004359:Drug Therapy, Combination; D005541:Forced Expiratory Volume; D006801:Humans
chemical_list: D018927:Anti-Asthmatic Agents