title: Efficacy, effectiveness, pragmatic trials--guidance on terminology and the advantages of pragmatic trials.
authors.forename: Claudia M
authors.initials: CM
authors.lastname: Witt
mesh_terms: D002986:Clinical Trials as Topic / Q000592:standards; D000529:Complementary Therapies / Q000379:methods* / Q000592:standards; D006801:Humans; D009626:Terminology as Topic