Neil A Busis1, E Ray Dorsey2. 1. From the Department of Neurology (N.A.B.), University of Pittsburgh School of Medicine, PA; and the Department of Neurology (E.R.D.), University of Rochester Medical Center, NY. busisna@upmc.edu. 2. From the Department of Neurology (N.A.B.), University of Pittsburgh School of Medicine, PA; and the Department of Neurology (E.R.D.), University of Rochester Medical Center, NY.