Assessment of cumulative evidence on genetic associations: Interim guidelines

John P.A. Ioannidis, Paolo Boffetta, Julian Little, Thomas R. O'Brien, Andre G. Uitterlinden, Paolo Vineis, David J. Balding, Anand Chokkalingam, Siobhan M. Dolan, W. Dana Flanders, Julian P.T. Higgins, Mark I. Mccarthy, David H. McDermott, Grier P. Page, Timothy R. Rebbeck, Daniela Seminara, Muin J. Khoury