4 Physical Medicine and Rehabilitation Unit, Azienda Policlinico Umberto I, Rome, Italy.. andrea.bernetti@uniroma1.it.
5 Physical Medicine and Rehabilitation Unit, Azienda Policlinico Umberto I, Rome, Italy. Board of Physical Medicine and Rehabilitation, Department of Orthopaedic Science, "Sapienza" University, Rome, Italy. valter.sanitlli@uniroma1.it.
6 Fondazione Don Carlo Gnocchi Onlus, Milan, Italy. Department of Geriatrics, Neurosciences and Orthopaedics, Catholic University of the Sacred Heart, Rome, Italy.. luca.padua@unicatt.it.