2 Board of Physical Medicine and Rehabilitation, Department of Orthopaedic Science, "Sapienza" University, Rome, Italy.
3 Hospital das Clinicas da Universidade da Sao Paulo, Brazil.
4 Unità operativa di Neuroriabilitazione ad Alta Intensità, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy.
5 IRCCS Fondazione Don Carlo Gnocchi, Milan, Italy.
6 IRCCS Fondazione Don Carlo Gnocchi, Milan, Italy; Department of Geriatrics, Neurosciences and Orthopaedics, Università Cattolica del Sacro Cuore, Rome, Italy.