1 Department of Geriatrics, Neurosciences and Orthopaedics, Università Cattolica del Sacro Cuore, Largo F. Vito 1, 00168, Rome, Italy. luca.padua@unicatt.it.
2 Department of Neurorehabilitation, Don Carlo Gnocchi Onlus Foundation, Piazzale Morandi n.6, 20100, Milan, Italy. luca.padua@unicatt.it.
3 Department of Clinical and Experimental Medicine, University of Sassari, viale san Pietro, 07100, Sassari, Italy.
4 Department of Geriatrics, Neurosciences and Orthopaedics, Università Cattolica del Sacro Cuore, Largo F. Vito 1, 00168, Rome, Italy.
5 Department of Neurorehabilitation, Don Carlo Gnocchi Onlus Foundation, Piazzale Morandi n.6, 20100, Milan, Italy.
6 Board of Physical Medicine and Rehabilitation, Department of Orthopedic Science, "Sapienza" University, Rome, Italy.