Por Huseyin Naci researcher 1 fellow 2, John P A Ioannidis director 3

1- LSE Health, London School of Economics and Political Science, London, UK; 2- Drug Policy Research Group, Department of Population Medicine,
Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, MA, USA; 3 - Stanford Prevention Research Center, Stanford University
School of Medicine, Stanford, CA, USA