[1] Hosp Vall dHebron Univ, Multiple Sclerosis Ctr Catalonia, Barcelona, Spain
[2] Univ Calif San Francisco, San Francisco, CA 94143 USA
[3] Genentech Inc, San Francisco, CA 94080 USA
[4] F Hoffmann La Roche Ltd, Basel, Switzerland
[5] Baden Wuerttemberg Cooperat State Univ, Lorrach, Germany