title: [Principles of selection of control groups in clinical and prophylactic trials].
mesh_terms: D002986:Clinical Trials as Topic; D003933:Diagnosis; D004358:Drug Therapy; D004992:Ethics, Medical; D006801:Humans; D011336:Probability; D011379:Prognosis; D012106:Research; D013223:Statistics as Topic
vernacular_title: Prinsipper for valg av kontrollgrupper i kliniske og profylaktiske forsøk.