[1] UCSF, Neurosci, San Francisco, CA USA
[2] Sci Inst HS Raffaele, Neurol, Milan, Italy
[3] Univ Dusseldorf, Neurosci, Dusseldorf, Germany
[4] Med Univ Lodz, Neurol, Lodz, Poland
[5] Univ British Columbia, Multiple Sclerosis Clin, Vancouver, BC V5Z 1M9, Canada
[6] McGill Univ, Montreal Neurol Inst & Hosp, Montreal, PQ, Canada
[7] F Hoffmann La Roche, Biometr, Basel, Switzerland
[8] F Hoffmann La Roche, Neurosci, Basel, Switzerland
[9] Mt Sinai Hosp, Neurol, New York, NY 10029 USA
[10] Univ Basel Hosp, CH-4031 Basel, Switzerland