We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleComparison of evidence on harms of medical interventions in randomized and nonrandomized studiesAuthorsPapanikolaou, Panagiotis; Christidi, Georgia; Ioannidis, JohnPublicationCMAJ - Canadian Medical Association Journal, 2006, Vol 174, Issue 5, p635ISSN0820-3946Publication typearticle