We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleNumbers needed to treat derived from meta-analyses--sometimes informative, usually misleading.AuthorsSmeeth, L; Haines, A; Ebrahim, SPublicationBMJ (Clinical research ed.), 1999, Vol 318, Issue 7197, p1548ISSN0959-8138Publication typeJournal ArticleDOI10.1136/bmj.318.7197.1548