1. Department of Movement, Human and Health Sciences, University of Rome “Foro Italico”, 00135 Rome, Italy
2. Neurology Unit, San Pietro Fatebenefratelli Hospital, MS Centre, 00189 Rome, Italy
3. Santa Maria Goretti Hospital, 04100 Latina, Italy
4. Department of Advanced Medical and Surgical Sciences, University of Campania “Luigi Vanvitelli”, 80138 Naples, Italy