[1] UCL, Inst Neurol, Dept Neuroinflammat, NMR Res Unit,Queen Sq Multiple Sclerosis Ctr, London, England
[2] UCL, CMIC, Translat Imaging Grp, London, England
[3] Stanford Univ, Dept Neurol & Neurol Sci, Stanford Multiple Sclerosis Ctr, Palo Alto, CA 94304 USA
[4] C Mondino Natl Neurol Inst, Brain MRI Res Ctr 3T, Pavia, Italy
[5] Univ Pavia, Dept Brain & Behav Sci, Pavia, Italy