[1] Univ Texas SW Med Ctr Dallas, Dept Neurol & Neurotherapeut, Dallas, TX 75235 USA
[2] Univ Texas SW Med Ctr Dallas, Dept Ophthalmol, Dallas, TX 75235 USA
[3] Univ Penn, Dept Neurol, Philadelphia, PA 19104 USA
[4] Johns Hopkins Univ Hosp, Dept Neurol, Baltimore, MD 21287 USA
[5] Univ Calif San Francisco, Dept Neurol, San Francisco, CA USA
[6] Stanford Univ, Dept Neurol, Stanford, CA 94305 USA
[7] Washington Univ, Dept Neurol, St Louis, MO USA
[8] Ruhr Univ Bochum, Dept Neurol, Bochum, Germany
[9] Univ Munich, Dept Neurol, D-80539 Munich, Germany
[10] Univ Dusseldorf, Dept Neurol, Dusseldorf, Germany
[11] Univ Munster, Dept Neurol, D-48149 Munster, Germany
[12] Charles Univ Prague, Dept Neurol, Prague, Czech Republic
[13] Wayne State Univ, Dept Neurol, Detroit, MI USA
[14] Mt Sinai Sch Med, Dept Neurol, New York, NY USA
[15] Ohio State Univ, Dept Neurol, Columbus, OH 43210 USA