1. From the Centre for Research in Epidemiology and Population Health, Villejuif, France (BdL-G, AB, and MAC); the University of Paris-Sud, UMR-S 1018, Villejuif, France (BdL-G, AB, and MAC); the School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom (LJ and PE); the Department of Clinical Epidemiology, Predictive Medicine and Public Health (AO and CL), the Faculty o