title: If there are no randomised controlled trials, do we always need more research?
authors.affiliation: The Campbell Collaboration, Norwegian Knowledge Centre for the Health Services, Oslo, Norway.
authors.forename: Karianne Thune
authors.initials: KT
authors.lastname: Hammerstrøm
authors.forename: Arild
authors.initials: A
authors.lastname: Bjørndal
mesh_terms: D006801:Humans; D016032:Randomized Controlled Trials as Topic; D012106:Research; D012196:Review Literature as Topic; D016896:Treatment Outcome