1 Ward of Internal Medicine, Policlinico Casilino Hospital, Rome, Italy; Department of Epidemiology, Surveillance and Promotion of Health, National Institute of Health, Rome, Italy.
2 Geriatric Rehabilitation Unit, Salus Infirmorum Clinic, Rome, Italy.
3 Ward of Internal Medicine, Policlinico Casilino Hospital, Rome, Italy.
4 Unità di Medicina per Acuti, Sant'Eugenio Hospital, Rome, Italy.
5 Department of Geriatrics, Sapienza University, Rome, Italy.