[1] Sanofi, Paris, France
[2] Erasmus Sch Hlth Policy & Management, Rotterdam, Netherlands
[3] Univ Copenhagen, Rigshosp Glostrup, Copenhagen, Denmark
[4] Univ Southern Denmark, Inst Mol Med, Dept Neurobiol Res, Odense, Denmark
[5] Haukeland Hosp, Bergen, Norway
[6] Osped Antonio Perrino, Brindisi, Italy
[7] Univ Florence, Dept Neurosci, Florence, Italy
[8] Fdn Policlin Univ A Gemelli IRCCS, Univ Cattolica, Rome, Italy
[9] IRCCS Ist Sci Neurol Bologna, UOSI Riabilitaz Sclerosi Multipla, Bologna, Italy
[10] Univ Bologna, Dipartimento Sci Biomed & Neuromotorie, Bologna, Italy
[11] Univ Campania, Div Neurol 2, Multiple Sclerosis Ctr, Caserta, Italy
[12] Univ Bari, Dept Basic Sci Neurosci & Sense Organs, Bari, Italy
[13] St Anna Hosp, Dept Neurosci, Multiple Sclerosis Ctr, Rome, Italy
[14] Univ Milan, Fdn IRCCS Ca Granda Osped Maggiore Policlin Milan, Milan, Italy