1. Unité de Neuropsychologie, Département des Sciences cognitives, Université de Liège, Liège, Belgium
2. Centre de la Mémoire, CHU de Liège, Liège, Belgium
3. Department of Old Age Psychiatry, Royal Edinburgh Hospital, Edinburgh, UK
4. Inserm, U558, F-31073, Toulouse, France
5. Department of Internal Medicine and Clinical Gerontology, Toulouse University Hospital, F-31059, France
6. Geriatric Medicine University of Edinburgh, Edinburgh, UK