1. Centre de recherche Inserm U897 Epidémiologie et Biostatistique; Université Bordeaux; Bordeaux France
2. Institut de Santé Publique; d'Epidémiologie et de Développement (ISPED); Université Bordeaux; Bordeaux France
3. Epidemiology of Occupational and Social Determinants of Health-Center for Research in Epidemiology and Population Health; Villejuif France
4. Université Versailles Saint-Quentin en Yvelines; Villejuif France
5. Africa Centre for Health and Population Studies; University of KwaZulu-Natal; Somkhele South Africa
6. Faculty of Medicine; University of Southampton; Southampton UK