1. From the Department of Neurology, SUNY Downstate Medical Center, Brooklyn, New York;
2. Department of Neurology, University of Texas Houston Medical School, Houston, Texas;
3. Department of Pathology, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York; and5Department of Ophthalmology, Bronx-Lebanon Hospital Center, Albert Einstein College of Medicine, Bronx, New York.