[1] Free Univ Amsterdam, Amsterdam, Netherlands
[2] Natl Multiple Sclerosis Soc, New York, NY USA
[3] Sci & Clin Review Associates LLC, New York, NY USA
[4] Ctr Hosp Reg Univ Rennes, Rennes, France
[5] Univ Hosp San Raffaele, Dept Neurol, Neuroimaging Res Unit, Milan, Italy
[6] Univ Dusseldorf, Dept Neurol, D-4000 Dusseldorf, Germany
[7] Univ Basel Hosp, Dept Neurol, CH-4031 Basel, Switzerland
[8] Univ Basel Hosp, Dept Res, CH-4031 Basel, Switzerland
[9] CUNY Mt Sinai Sch Med, New York, NY 10029 USA
[10] Foothills Med Ctr, Calgary, AB, Canada
[11] Natl Inst Neurol Disorders & Stroke, Bethesda, MD USA
[12] St Michaels Hosp, Toronto, ON M5B 1W8, Canada
[13] Univ Lund Hosp, S-22185 Lund, Sweden
[14] UCL Inst Neurol, London WC1N 3BG, England
[15] Mayo Clin, Coll Med, Rochester, MN USA
[16] Univ Texas, Hlth Sci Ctr, Houston, TX USA