[1] Univ Cagliari, Dept Med Sci & Publ Hlth, Multiple Sclerosis Ctr, Cagliari, Italy
[2] Federico II Univ Naples, Naples, Italy
[3] Univ Genoa, Sect Biostat, Dept Hlth Sci, Genoa, Italy
[4] Gallarate Hosp, Multiple Sclerosis Ctr, ASST Valle Olona, Gallarate, Italy
[5] AOU San Luigi Gonzaga, Ctr Riferimento Reg Sclerosi Multipla, SCDO Neurol, Orbassano, TO, Italy
[6] Univ Campania Luigi Vanvitelli, Multiple Sclerosis Ctr, Div Neurol 2, Naples, Italy
[7] Univ Genoa, Genoa, Italy
[8] IRCCS Azienda Osped Univ San Martino IST, Genoa, Italy
[9] ASST Papa Giovanni XXIII, Bergamo, Italy
[10] AOU Osped Riuniti Trieste, Trieste, Italy
[11] A Cardarelli Hosp, Neurol & Stroke Unit, Naples, Italy
[12] Univ Campania Luigi Vanvitelli, Dept Med Surg Neurol Metab & Aging Sci, Naples, Italy
[13] Univ Turin, AOU San Luigi Gonzaga, Clin & Biol Sci Dept, Orbassano, TO, Italy