1. Department of Medical and Surgical Sciences, University of Foggia, Foggia, Italy
2. University of Modena and Reggio Emilia, Moderna, Emilia-Ronagna, Italy
3. IRCSS G.Giglio, Cefalù, Italy
4. Azienda Ospedaliera Universitaria "Mater
Domini", Catanzaro, Italy
5. Unit of Neurosciences, Department of Medicine and Surgery, University of Parma, Parma, Italy
6. Multiple Sclerosis Centre, Department of General Medicine, Parma University Hospital, Parma, Italy
7. Department "G.F. Ingrassia", MS Center University of Catania, Catania, Italy
8. Multiple Sclerosis Center, II Division
of Neurology, Department of Clinical and Experimental Medicine, Second University of Naples, Naples, Italy
9. Dipartimento di Scienze Mediche e Chirurgiche Avanzate, Università della Campania Luigi Vanvitelli, Piazza
Miraglia, 2, 80138 Naples, Italy