[1] Hosp Univ Vall Hebron, Unit Clin Neuroimmunol, Multiple Sclerosis Ctr Catalonia CEMcat, Barcelona 08035, Spain
[2] UCL, Inst Neurol, NMR Res Unit, Dept Neuroinflammat & Brain Repair, London, England
[3] UCL, Inst Neurol, NMR Res Unit, Dept Rehabil,Dept Neuroradiol, London, England
[4] Vrije Univ Amsterdam, Med Ctr, Dept Neuroradiol, Amsterdam, Netherlands
[5] Vrije Univ Amsterdam, Med Ctr, Dept Neurol, Amsterdam, Netherlands
[6] Med Univ Graz, Dept Neurol, Graz, Austria
[7] Inst Sci, Dept Neurol, Neuroimaging Res Unit, Milan, Italy
[8] Glostrup Univ Hosp, Dept Neurol, Copenhagen, Denmark
[9] Glostrup Univ Hosp, MRI Res Unit, Copenhagen, Denmark
[10] Univ Basel Hosp, Dept Neurol, CH-4031 Basel, Switzerland
[11] John Radcliffe Hosp, Dept Neurol, MS Unit, Oxford OX3 9DU, England
[12] Fdn Don C Gnocchi, Sci Inst Santa Maria Nascente, Multiple Sclerosis Ctr, Milan, Italy
[13] Univ Siena, Dept Neurol & Behav Sci, I-53100 Siena, Italy