We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleCritical appraisal of published research: introductory guidelines.AuthorsFowkes, F G; Fulton, P MPublicationBMJ, 1991, Vol 302, Issue 6785, p1136ISSN0959-8138Publication typearticleDOI10.1136/bmj.302.6785.1136