We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitlePower and instrument strength requirements for Mendelian randomization studies using multiple genetic variants.AuthorsPierce BL; Ahsan H; Vanderweele TJPublicationInternational journal of epidemiology, 2011, Vol 40, Issue 3, p740ISSN1464-3685Publication typearticleDOI10.1093/ije/dyq151