title: Spacing devices and metered-dose inhalers in childhood asthma.
authors.forename: H
authors.initials: H
authors.lastname: Levison
authors.forename: P A
authors.initials: PA
authors.lastname: Reilly
authors.forename: G H
authors.initials: GH
authors.lastname: Worsley
mesh_terms: D000318:Adrenergic beta-Agonists / Q000008:administration & dosage* / Q000627:therapeutic use; D000336:Aerosols; D001249:Asthma / Q000188:drug therapy*; D001993:Bronchodilator Agents / Q000008:administration & dosage* / Q000627:therapeutic use; D002648:Child; D006801:Humans; D012138:Respiratory Therapy / Q000295:instrumentation* / Q000379:methods
chemical_list: D000318:Adrenergic beta-Agonists; D000336:Aerosols; D001993:Bronchodilator Agents