title: Required sample size for randomized clinical trials.
authors.forename: I H
authors.initials: IH
authors.lastname: Lewis
mesh_terms: D003627:Data Interpretation, Statistical; D004487:Edema / Q000453:epidemiology / Q000209:etiology; D006801:Humans; D007442:Intubation, Intratracheal / Q000009:adverse effects; D007818:Laryngeal Diseases / Q000453:epidemiology / Q000209:etiology; D016032:Randomized Controlled Trials as Topic; D012307:Risk Factors; D015983:Selection Bias