[1] Univ Bordeaux, Bordeaux, France
[2] Med Univ Vienna, Dept Neurol, Vienna, Austria
[3] Cleveland Clin, Mellen Ctr MS, Cleveland, OH 44106 USA
[4] Univ Ottawa, Ottawa, ON, Canada
[5] Ottawa Hosp Res Inst, Ottawa, ON, Canada
[6] Heinrich Heine Univ, Dept Neurol, Ctr Neurol & Neuropsychiat, UKD, Dusseldorf, Germany
[7] Heinrich Heine Univ, LVR Klinikum, Dusseldorf, Germany
[8] Akershus Univ Hosp, Dept Neurol, Lorenskog, Norway
[9] Vrije Univ Amsterdam Med Ctr, Dept Neurol, Amsterdam, Netherlands
[10] Loyola Univ, Chicago, IL 60611 USA
[11] F Hoffmann La Roche Ltd, Basel, Switzerland
[12] Vall dHebron Hosp Univ, Ctr Esclerosi Multiple Catalunya Cemcat, Barcelona, Spain