title: Registries and RCTs for new interventional procedures.
authors.forename: Roger M
authors.initials: RM
authors.lastname: Greenhalgh
authors.forename: Janet T
authors.initials: JT
authors.lastname: Powell
mesh_terms: D017544:Aortic Aneurysm, Abdominal / Q000601:surgery; D004282:Documentation / Q000592:standards*; D006801:Humans; D016032:Randomized Controlled Trials as Topic / Q000592:standards*; D012042:Registries / Q000592:standards*; D016896:Treatment Outcome