Hofmeyr, J L Evaluation of positive expiratory pressure as an adjunct to chest physiotherapy in the treatment of cystic fibrosis. [electronic resource] - Thorax Dec 1986 - 951-4 p. digital Publication Type: Clinical Trial; Comparative Study; Controlled Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't ISSN: 0040-6376 Standard No.: 10.1136/thx.41.12.951 doi Subjects--Topical Terms: AdolescentAdultClinical Trials as TopicCystic Fibrosis--physiopathologyFemaleHumansMalePhysical Therapy Modalities--instrumentationPositive-Pressure RespirationRandom Allocation