Raphaëlle Varraso1,2, Seif O Shaheen3. 1. INSERM U1168, Aging and Chronic Diseases, Epidemiological and Public Health Approaches, Villejuif, France. 2. UVSQ, UMR-S 1168, Université Versailles St-Quentin-en-Yvelines, Versailles, France. 3. Centre for Primary Care and Public Health, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK.