1. From the Neurological Intensive Care Unit, Departments of Neurosurgery and Neurology (J.A.F.), Mount Sinai School of Medicine, New York, NY; Departments of Neurology (A.F., J.C., M.S., K.E.W., N.B., K.L., S.A.M.) and Neurosurgery (N.B., E.S.C., S.A.M.), Columbia University College of Physicians and Surgeons, New York, NY.