James L Bernat1, John C M Brust2. 1. From the Departments of Neurology and Medicine (J.L.B.), Geisel School of Medicine at Dartmouth, Hanover, NH; and Department of Neurology, Columbia University College of Physicians & Surgeons, the New York Neurological Institute, NY. Bernat@dartmouth.edu. 2. From the Departments of Neurology and Medicine (J.L.B.), Geisel School of Medicine at Dartmouth, Hanover, NH; and Department of Neurology, Columbia University College of Physicians & Surgeons, the New York Neurological Institute, NY.