[1] Univ Roma Tor Vergata, Dept Syst Med, Multiple Sclerosis Clin & Res Unit, Rome, Italy
[2] ASST Lecco, MS Ctr, Lecce, Italy
[3] San Raffaele Hosp IRCCS, MS Ctr, Dept Neurol, Milan, Italy
[4] Grande Osped Metropolitano Bianchi Melacrino More, UOC Neurol, Reggio Di Calabria, Italy
[5] San Paolo Hosp ASL Napoli 1 Ctr, Neurol Unit, Naples, Italy
[6] San Paolo Hosp ASL Napoli 1 Ctr, MS Ctr, Naples, Italy
[7] IRCCS Neuromed, Neurol Unit, Pozzilli, Italy
[8] Univ Roma Tor Vergata, Dept Syst Med, Rome, Italy