1. Institute of Gerontology and Geriatrics, Department of Medicine, University of Perugia, Perugia, Italy; Fondazione Roma Sanità, Rome, Italy
2. Fondazione Roma Sanità e Associazione Italiana Psicogeriatria, Rome, Italy
3. Institute of Gerontology and Geriatrics, Department of Medicine, University of Perugia, Perugia, Italy; A.M.A.T.A. UMBRIA, Perugia, Italy
4. Institute of Gerontology and Geriatrics, Department of Medicine, University of Perugia, Perugia, Italy