1. Department of Neurosciences, Reproductive Sciences and Dentistry, University of Naples Federico II, 80131 Naples, Italy
2. Department of Public Health, University of Naples Federico II, 80131 Naples, Italy
3. Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, 80131 Naples, Italy
4. MS Unit, Federico II University Hospital, 80131 Naples, Italy
5. Department “G.F. Ingrassia”, MS Center, University of Catania, 95125 Catania, Italy
6. MS Center, S. Andrea Hospital, Sapienza University of Rome, 00185 Rome, Italy
7. Neurology Unit, Multiple Sclerosis Center, IRCCS San Raffaele Scientific Institute, 20132 Milan, Italy
8. Centro Sclerosi Multipla, ASST Spedali Civili di Brescia, Ospedale di Montichiari, 25018 Brescia, Italy
9. San Luigi Gonzaga Academic Hospital, 10043 Orbassano, Italy
10. Department of Advanced Medical and Surgical Sciences, University of Campania “Luigi Vanvitelli”, 81100 Naples, Italy
11. S. Filippo Neri Hospital, 00135 Rome, Italy
12. NCL-Istituto di Neuroscienze Gruppo Neuromed, 00178 Rome, Italy
13. Intradepartmental Program of Clinical Psychology, Federico II University Hospital, 80131 Naples, Italy
14. Vita-Salute San Raffaele University, 20132 Milan, Italy
15. MS Center, San Pietro Hospital Fatebenefratelli, 00189 Rome, Italy
16. Department of Human Neurosciences, Sapienza University, 00185 Rome, Italy