Cevallos Myriam, Poole Charles, von Elm Erik, Altman Doug, Egger Matthias
CTU Bern, University of Bern, Finkenhubelweg 11, 3012 Bern, Switzerland.
Department of Epidemiology, UNC Gillings School of Global Public Health, University of North Carolina, 170 Rosenau Hall, CB #7400, 135 Dauer Drive, Chapel Hill, NC 27599-7400, USA.
J Clin Epidemiol. 2014 Jul;67(7):837-8. doi: 10.1016/j.jclinepi.2014.02.011. Epub 2014 Apr 26.