[1] CHU Vaudois, Dept Psychiat, Serv Old Age Psychiat, Lausanne, Switzerland
[2] Univ Lausanne, Lausanne, Switzerland
[3] Univ Bern, Dept Old Age Psychiat, Univ Hosp Psychiat, Bern, Switzerland
[4] Univ Lausanne, Inst Psychol Geopolis, Lausanne, Switzerland