title: Randomised controlled trials: understanding power.
authors.affiliation: Institute for Medical and Biomedical Education, St George's, University of London, London, UK p.sedgwick@sgul.ac.uk.
authors.forename: Philip
authors.initials: P
authors.lastname: Sedgwick
mesh_terms: D006801:Humans; D008197:Lymph Node Excision; D008209:Lymphedema / Q000628:therapy; D011183:Postoperative Complications / Q000628:therapy; D016032:Randomized Controlled Trials as Topic / Q000706:statistics & numerical data*