title: Duration of steroid therapy determines dose-response effect.
authors.forename: Brian J
authors.initials: BJ
authors.lastname: Lipworth
mesh_terms: D001249:Asthma / Q000175:diagnosis / Q000188:drug therapy*; D001507:Beclomethasone / Q000627:therapeutic use*; D001944:Breath Tests; D004305:Dose-Response Relationship, Drug; D004334:Drug Administration Schedule; D006801:Humans; D016210:Methacholine Chloride; D009299:Nasal Provocation Tests; D009569:Nitric Oxide / Q000032:analysis*
chemical_list: D016210:Methacholine Chloride; D009569:Nitric Oxide; D001507:Beclomethasone