title: When should a long acting {beta} agonist be added to an inhaled corticosteroid?
authors.forename: A E
authors.initials: AE
authors.lastname: Tattersfield
mesh_terms: D000280:Administration, Inhalation; D000305:Adrenal Cortex Hormones / Q000008:administration & dosage*; D000318:Adrenergic beta-Agonists / Q000008:administration & dosage*; D001249:Asthma / Q000188:drug therapy* / Q000503:physiopathology; D004359:Drug Therapy, Combination; D005541:Forced Expiratory Volume / Q000187:drug effects; D006801:Humans; D015201:Meta-Analysis as Topic
chemical_list: D000305:Adrenal Cortex Hormones; D000318:Adrenergic beta-Agonists