Strengthening the reporting of genetic association studies (STREGA): an extension of the STROBE Statement

Julian Little; Julian P. T. Higgins; John P. A. Ioannidis; David Moher; France Gagnon; Erik von Elm; Muin J. Khoury; Barbara Cohen; George Davey-Smith; Jeremy Grimshaw; Paul Scheet; Marta Gwinn; Robin E. Williamson; Guang Yong Zou; Kim Hutchings; Candice Y. Johnson; Valerie Tait; Miriam Wiens; Jean Golding; Cornelia van Duijn; John McLaughlin; Andrew Paterson; George Wells; Isabel Fortier; Matthew Freedman; Maja Zecevic; Richard King; Claire Infante-Rivard; Alex Stewart; Nick Birkett