title: Sample size determination and statistical power in randomized controlled trials.
authors.forename: Petteri
authors.initials: P
authors.lastname: Sjögren
authors.forename: Lennart
authors.initials: L
authors.lastname: Hedström
mesh_terms: D015982:Bias; D006801:Humans; D016032:Randomized Controlled Trials as Topic / Q000592:standards / Q000706:statistics & numerical data*; D012107:Research Design / Q000592:standards; D018401:Sample Size