title: Evaluating new surgical procedures. Design of trials should depend on whether new skills are required.
authors.forename: A W
authors.initials: AW
authors.lastname: Majeed
authors.forename: A G
authors.initials: AG
authors.lastname: Johnson
mesh_terms: D002983:Clinical Competence; D006801:Humans; D016032:Randomized Controlled Trials as Topic; D012107:Research Design; D013514:Surgical Procedures, Operative