Ruffin, R E Ipratropium bromide (Sch 1000) monohydrate aerosol: bronchodilator effect of three dose levels in asthmatics. [electronic resource] - Lung 1978 - 141-6 p. digital Publication Type: Clinical Trial; Journal Article ISSN: 0341-2040 Standard No.: 10.1007/BF02730688 doi Subjects--Topical Terms: AdultAerosolsAsthma--drug therapyAtropine Derivatives--administration & dosageBronchi--physiopathologyBronchodilator Agents--administration & dosageClinical Trials as TopicDouble-Blind MethodFemaleHumansIpratropium--administration & dosageMaleMiddle AgedPlacebos