title: Evaluating the quality of new procedures.
authors.affiliation: National Perinatal Epidemiology Unit, Oxford.
authors.forename: I
authors.initials: I
authors.lastname: Chalmers
mesh_terms: D002986:Clinical Trials as Topic; D004841:Episiotomy / Q000592:standards*; D006801:Humans; D011786:Quality Control; D013537:Sutures / Q000592:standards*