[1] Fdn IRCCS Neurol Inst C Besta, Unit Neuroepidemiol, Milan, Italy
[2] Fdn IRCCS Neurol Inst C Besta, Dept Neuroimmunol & Neuromuscular Dis, Milan, Italy
[3] Fdn IRCCS Ist Nazl Cura Tumori, Unit Clin Psychol, Milan, Italy
[4] Univ Hosp Policlin Vittorio Emanuele, Neurol Clin, MS Ctr, Catania, Italy
[5] Fdn IRCCS S Lucia, Multiple Sclerosis Unit, Rome, Italy
[6] ANTEA Charitable Fdn, Rome, Italy
[7] FARO Charitable Fdn, Turin, Italy
[8] Italian Multiple Sclerosis Fdn FISM, Sci Res Area, Genoa, Italy
[9] Univ Siena, Dept Life Sci, Siena, Italy