We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleMeta-analysis: Principles and proceduresAuthorsEgger, M.; Smith, G. D.; Phillips, A. NPublicationBMJ, 1997, Vol 315, Issue 7121, p1533ISSN0959-8138Publication typearticleDOI10.1136/bmj.315.7121.1533