1. Department of Translational Biomedicines and Neurosciences, University of Bari Aldo Moro, Bari, Italy
2. Department of Neurofarba, University of Florence, Florence, Italy
3. Center for Outcomes Research and Clinical Epidemiology (CORESEARCH), Pescara, Italy
4. Dipartimento di Medicina di Precisione e Rigenerativa e Area Jonica (DiMePRe-J), University of Bari Aldo Moro, Bari, Italy
5. Neurology Unit and MS Center, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), San Raffaele Scientific Institute, Milan, Italy
6. Vita-Salute San Raffaele University, Milan, Italy
7. Multiple Sclerosis Clinical Care and Research Center, Department of Neuroscience (NSRO), Federico II University, Naples, Italy
8. Dipartimento di Scienze Mediche e Chirurgiche e Tecnologie Avanzate, GF Ingrassia, Sez. Neuroscienze, Centro Sclerosi Multipla, Università di Catania, Catania, Italy
9. Multiple Sclerosis Center, Hospital of Gallarate, ASST della Valle Olona, Gallarate (Varese), Italy
10. Centro Sclerosi Multipla–Azienda Ospedaliera S. Camillo Forlanini, Rome, Italy
11. Centro Sclerosi Multipla, Clinica Neurologica, Policlinico SS. Annunziata, Chieti, Italy
12. Department of Neurosciences, Ospedale Civile di Baggiovara, Azienda Ospedaliero–Universitaria di Modena, Modena, Italy
13. Unit of Neurosciences, Department of Medicine and Surgery, University of Parma, Parma, Italy
14. Multiple Sclerosis Center, Department of Human Neuroscience, S. Andrea Hospital, Rome, Italy
15. Department of Neurosciences, Mental Health and Sensory Organs, Centre for Experimental Neurological Therapies (CENTERS), Sapienza University of Rome, Rome, Italy
16. Department of Neurosciences, Multiple Sclerosis Centre–Veneto Region (CeSMuV), University Hospital of Padua, Padua, Italy
17. IRCCS Mondino Foundation, Pavia, Italy
18. Center for Multiple Sclerosis, ASM P.O. “Madonna Delle Grazie,” Matera, Italy
19. Multiple Sclerosis Center, II Division of Neurology, Department of Clinical and Experimental Medicine, Second University of Naples, Naples, Italy
20. Unit of Neurology, Cà Foncello Hospital, Treviso, Italy
21. Neurology and Stroke Unit, University of Insubria, Varese, Italy
22. IRCCS Istituto Scienze Neurologiche di Bologna, Bologna, Italy
23. Dipartimento di Scienze Biomediche e Neuromotorie, Università di Bologna, Bologna, Italy
24. San Salvatore Hospital, Demyelinating Disease Center, L’Aquila, Italy
25. Department of Neurology, AORN San G. Moscati di Avellino, Avellino, Italy
26. University of Cagliari, Department of Medical Science and Public Health, Centro Sclerosi Multipla, Cagliari, Italy
27. Department of Neurology, ASST Lariana Ospedale S. Anna, Como, Italy
28. Department of Neurology, Ospedale Garibaldi, Catania, Italy
29. Institute of Neurology, Magna Græcia University of Catanzaro, Catanzaro, Italy
30. IRCCS Istituto Neurologico C. Besta, Neuroimmunology Unit, Milan, Italy
31. Department of Neuroscience, Niguarda Hospital, Milano, Italy
32. A Cardarelli Hospital, Neurological Clinic and Multiple Sclerosis Center, Naples, Italy
33. Department of Biomedicine, Neuroscience and Advanced Diagnostics, University of Palermo, Palermo, Italy
34. Multiple Sclerosis Center, UO Neurology, Fidenza Hospital, Fidenza, Italy
35. Department of Medical and Surgical Sciences, Magna Graecia University of Catanzaro, Catanzaro, Italy
36. Public Health Department, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy
37. IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy
38. for the Italian Multiple Sclerosis Register