[1] UCL Inst Neurol, Natl Hosp Neurol & Neurosurg, London, England
[2] Univ Calif San Francisco, San Francisco, CA 94143 USA
[3] Ottawa Hosp, Ottawa, ON, Canada
[4] Univ Dusseldorf, Dusseldorf, Germany
[5] Univ Basel Hosp, CH-4031 Basel, Switzerland
[6] Hosp Salpetriere, Paris, France
[7] Mt Sinai Med Ctr, Corinne Goldsmith Dickinson Ctr Multiple Sclerosi, New York, NY 10029 USA
[8] Hosp Univ Vall dHebron, Barcelona, Spain
[9] Harvard Univ, Brigham & Womens Hosp, Sch Med, Boston, MA 02115 USA
[10] Univ Texas Hlth Sci Ctr Houston, Houston, TX 77030 USA
[11] Novartis Pharma AG, Basel, Switzerland
[12] Novartis Pharmaceut, E Hanover, NJ USA
[13] Vrije Univ Amsterdam Med Ctr, Amsterdam, Netherlands