1. Service de gériatrie; CHU Rennes; Rennes France
2. Centre de Recherche sur l'Action Politique en Europe UMR; Rennes France
3. German Center for Neurodegenerative Diseases (DZNE), Rostock/ Greifswald; Greifswald Germany
4. Institute for Community Medicine, Dep. Epidemiology of Health and Community Health; University Medicine; Greifswald Germany
5. Faculté de médecine; Université de Rennes 1; Rennes France