Department of Geriatrics, Neurosciences and Orthopedics, Catholic University of the Sacred Heart School of Medicine, Teaching Hospital 'Agostino Gemelli', Rome, Italy. Geriatric Unit, Campus Bio-Medico University, Rome, Italy. Geriatrics Unit, Department of Clinical and Experimental Medicine, University of Pisa4, Pisa PI, Italy. Department of Internal Medicine and Medical Specialties (DIMI), Section of Geriatrics, University of Genoa, Genoa, Italy. IRCCS Ospedale Policlinico San Martino, Genoa, Italy. Geriatric Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, University of Milan, Milan, Italy. Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy.