1 Don Carlo Gnocchi Onlus Foundation, Milan, Italy danielecoraci@aol.com; Rehabilitation Units, Policlinico Universitario Agostino, Gemelli Foundation, Rome, Italy; Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy; Hospital das Clinicas da Universidade da Sao Paulo, Brazil; Don Carlo Gnocchi Onlus Foundation, Milan, Italy; Don Carlo Gnocchi Onlus Foundation, Milan, Italy and Department of Geriatrics, Neurosciences and Orthopaedics, Università Cattolica del Sacro Cuore, Rome, Italy.