title: Switching between superiority and non-inferiority.
authors.affiliation: Public Health Sciences, University of Edinburgh, Medical School, Teviot Place, Edinburgh EH8 9AG. gordon.murray@ed.ac.uk
authors.forename: G D
authors.initials: GD
authors.lastname: Murray
mesh_terms: D002986:Clinical Trials as Topic / Q000592:standards*; D017408:Guidelines as Topic; D006801:Humans; D012107:Research Design / Q000592:standards