title: Randomised controlled trials (RCTs)--sample size: the magic number (SMJ Vol 44 Issue 4 April 2003).
authors.forename: Rebecca P
authors.initials: RP
authors.lastname: Ang
mesh_terms: D006801:Humans; D016032:Randomized Controlled Trials as Topic; D012107:Research Design; D018401:Sample Size; D012984:Software