1. From the Institute of Social and Preventive Medicine, University Hospital Center and University of Lausanne, Lausanne, Switzerland (A.C., F.P., P.B.); Department of Epidemiology, Biostatistics, and Occupational Health (A.C., G.P., J.A.H.) and Health Center Research Institute (G.P.), McGill University, Montreal, Quebec, Canada; and Ministry of Health and Social Development, Victoria, Republic of Seychelles (G.M., P.B.).