[1] Univ Texas Southwestern Med Ctr Dallas, Dallas, TX 75390 USA
[2] Hop Hautepierre, Strasbourg, France
[3] Hosp Clin Barcelona, Serv Neurol, Barcelona, Spain
[4] Univ Barcelona, Inst Invest Biomed August Pi & Sunyer IDIBAPS, Barcelona, Spain
[5] Natl Ctr Neurol & Psychiat, Natl Inst Neurosci, Tokyo, Japan
[6] Univ Calif Los Angeles, David Geffen Sch Med, Dept Med, Los Angeles, CA 90095 USA
[7] F Hoffmann La Roche Ltd, Basel, Switzerland
[8] Mayo Clin, Rochester, MN USA
[9] Univ Catania, Dept Med & Surg Sci & Adv Technol GF Ingrassia, Catania, Italy
[10] Multiple Sclerosis Ctr AOU Policlin G Rodolico Sa, Catania, Italy