1. From the Department of Neurology (S.B.K., H.A.C., A.M.C., J.M.S., N.B., J.C., S.A.M., K.L.) and Neurosurgery (A.M.C., E.S.C.), Columbia University College of Physicians and Surgeons, New York, NY; Clinical Department of Neurology (R.H.), Neurological Intensive Care Unit, Medical University Innsbruck, Innsbruck, Austria.