1. From the Department of Epidemiology and Public Health, University College London, London, UK (M.H., S.S., G.D.B., M.J.S., A.G.T., A.S.-M., M.K.); First Department of Medicine, Semmelweis University Faculty of Medicine, Budapest, Hungary (A.G.T.); and INSERM U1018, Center for Research in Epidemiology and Population Health, Villejuif, France (A.S.-M.).