1. From the Department of Neurology and Neurosurgery (C.S.W.A., E.J.S.), Emory University School of Medicine, Atlanta, GA; Department of Neurology (M.B.P., N.A.M.), Program in Trauma, University of Maryland School of Medicine, Baltimore; Department of Neurology (N.R.B.), University of Pittsburgh School of Medicine, PA; and Department of Neurology (S.K.H., S.K., E.M.O., J.A.V.), Emory University School of Medicine, Atlanta, GA.