1. Geriatric Epidemiology Research Department; Instituto Nacional de Geriatría; Mexico City Mexico
2. Gérontopôle; Centre Hospitalier Universitaire de Toulouse; Toulouse France
3. Université de Toulouse III Paul Sabatier; Toulouse France
4. Geriatrics Department; Universidad de la República; Montevideo Uruguay
5. Institute of Gerontology and Geriatrics; Department of Medicine; University of Perugia; Perugia Italy
6. Internal Medicine Department; Rio de Janeiro State University; Rio de Janeiro Brazil
7. Aging Institute; Pontificia Universidad Javeriana; Bogotá Colombia
8. Internal Medicine and Geriatrics Department; Universidad Autónoma de Baja California; Tijuana Baja California Mexico