1. IRCCS Fondazione Don Carlo Gnocchi, Milan, Italy
2. Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
3. Physical Medicine and Rehabilitation Unit, Sant’Andrea Hospital, University of Rome – “La Sapienza”, Rome, Italy
4. Department of Geriatrics, Neurosciences and Orthopedics, Catholic University of the Sacred Heart, Rome, Italy