How many patients do I need? Sample size and power calculations.
Research Department of Infection and Population Health, UCL Medical School, Royal Free Campus, Rowland Hill Street, London NW32PF, UK. c.smith@ucl.ac.uk
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D006801:Humans; D008962:Models, Theoretical; D016032:Randomized Controlled Trials as Topic; D018401:Sample Size; D013223:Statistics as Topic