1 From the Department of Neurology (L.A.H.), University of Oklahoma Health Sciences Center, Oklahoma City; and Department of Neurology (R.T.), The Ohio State University, Columbus. linda-hershey@ouhsc.edu.
2 From the Department of Neurology (L.A.H.), University of Oklahoma Health Sciences Center, Oklahoma City; and Department of Neurology (R.T.), The Ohio State University, Columbus.