[1] Univ Texas, SW Med Ctr, Dept Neurol, Dallas, TX 75235 USA
[2] Univ Texas, SW Med Ctr, Dept Ophthalmol, Dallas, TX 75235 USA
[3] Charles Univ Prague, Dept Neurol, CR-11636 Prague 1, Czech Republic
[4] CUNY Mt Sinai Sch Med, Dept Neurol, New York, NY 10029 USA
[5] Vrije Univ Amsterdam, Dept Radiol, Med Ctr, NL-1081 HV Amsterdam, Netherlands
[6] Chaim Sheba Med Ctr, Multiple Sclerosis Ctr, IL-52621 Tel Hashomer, Israel
[7] Tel Aviv Univ, Sackler Sch Med, IL-69978 Tel Aviv, Israel
[8] Guys Hosp, Dept Neurol, London SE1 9RT, England
[9] Stanford Univ, Dept Neurol, Stanford, CA 94305 USA
[10] Harvard Univ, Brigham & Womens Hosp, Dept Neurol, Boston, MA 02115 USA
[11] Univ Calif Irvine, Dept Neurol, Irvine, CA 92717 USA
[12] Univ Buffalo, Jacobs Neurol Inst, Buffalo Neuroimaging Anal Ctr, Dept Neurol, Buffalo, NY USA
[13] Univ Colorado, Dept Neurol, Denver, CO 80202 USA
[14] Albert Einstein Coll Med, Dept Pathol, Bronx, NY 10467 USA
[15] Univ Alabama, Dept Biostat, Tuscaloosa, AL 35487 USA
[16] Natl Multiple Sclerosis Soc, Res Program, New York, NY USA
[17] Natl Multiple Sclerosis Soc, Clin Program, New York, NY USA
[18] Ist Sci San Raffaele, Dept Neurol, I-20132 Milan, Italy
[19] Univ Milan, Osped San Raffaele, I-20132 Milan, Italy