1. Department of Medicine and Surgery, Internship Program in Geriatrics, Università Campus Bio-Medico di Roma, Via Alvaro del Portillo, 21-00128 Roma, Italy
2. Operative Research Unit of Internal Medicine, Fondazione Policlinico Universitario Campus Bio-Medico, Via Alvaro del Portillo, 21-00128 Roma, Italy
3. Operative Research Unit of Emergency Medicine, Fondazione Policlinico Universitario Campus Bio-Medico, Via Alvaro del Portillo, 21-00128 Roma, Italy
4. Department of Medicine and Surgery, Research Unit of Geriatrics, Università Campus Bio-Medico di Roma, Via Alvaro del Portillo, 21-00128 Roma, Italy
5. Operative Research Unit of Geriatrics, Fondazione Policlinico Universitario Campus Bio-Medico, Via Alvaro del Portillo, 21-00128 Roma, Italy