Designing randomized clinical trials in surgery.
Department of Surgery, General Surgery Unit, Maggiore Hospital of Bologna, and Department of Specialized Orthopaedic-Trauma Pathology, General and Thoracic Musculoskeletal Surgery Unit, Rizzoli Orthopaedic Institute of Bologna, Bologna, Italy. dr.raffaelelombardi@gmail.com.
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D006801:Humans; D016032:Randomized Controlled Trials as Topic / Q000379:methods*; D012107:Research Design; D018401:Sample Size; D013514:Surgical Procedures, Operative / Q000379:methods*