Scopus-Elsevier European Journal of Epidemiology, 24(1), 37-55. Springer Netherlands Italian Journal of Public Health, Vol 6, Iss 3 (2009) Italian Journal of Public Health; Vol 6, No 3 (2009): Vaccination policies and practice PLoS Medicine PLoS Medicine, Vol 6, Iss 2, p e22 (2009) University of Bristol-PURE ResearcherID Little, Julian; Higgins, Julian P T; Ioannidis, John P A; Moher, David; Gagnon, France; von Elm, Erik; Khoury, Muin J; Cohen, Barbara; Davey-Smith, George; Grimshaw, Jeremy; Scheet, Paul; Gwinn, Marta; Williamson, Robin E; Zou, Guang Yong; Hutchings, Kim; Johnson, Candice Y; Tait, Valerie; Wiens, Miriam; Golding, Jean; van Duijn, Cornelia; ... (2009). STrengthening the REporting of Genetic Association Studies (STREGA): an extension of the STROBE statement. PLoS medicine, 6(2), e22. San Francisco, Calif.: Public Library of Science 10.1371/journal.pmed.1000022 European Journal of Clinical Investigation PLoS Medicine (print), 6(2), 151-163. Public Library of Science Little, Julian; Higgins, Julian P T; Ioannidis, John P A; Moher, David; Gagnon, France; von Elm, Erik; Khoury, Muin J; Cohen, Barbara; Davey-Smith, George; Grimshaw, Jeremy; Scheet, Paul; Gwinn, Marta; Williamson, Robin E; Zou, Guang Yong; Hutchings, Kim; Johnson, Candice Y; Tait, Valerie; Wiens, Miriam; Golding, Jean; van Duijn, Cornelia; ... (2009). Strengthening the reporting of genetic association studies (STREGA): an extension of the STROBE Statement. Human genetics, 125(2), pp. 131-151. Berlin: Springer 10.1007/s00439-008-0592-7 Genetic Epidemiology, 33(7), 581-598. Wiley-Liss Inc. Little, Julian; Higgins, Julian P T; Ioannidis, John P A; Moher, David; Gagnon, France; von Elm, Erik; Khoury, Muin J; Cohen, Barbara; Davey-Smith, George; Grimshaw, Jeremy; Scheet, Paul; Gwinn, Marta; Williamson, Robin E; Zou, Guang Yong; Hutchings, Kim; Johnson, Candice Y; Tait, Valerie; Wiens, Miriam; Golding, Jean; van Duijn, Cornelia; ... (2009). Strengthening the reporting of genetic association studies (STREGA): an extension of the STROBE statement. European journal of epidemiology, 24(1), pp. 37-55. Dordrecht: Springer 10.1007/s10654-008-9302-y European Journal of Epidemiology European Journal of Clinical Investigation, 39(4), 247-266. Wiley-Blackwell Publishing Ltd Web of Science