1. Department of Neurology, Neurological Intensive Care Unit, Columbia University College of Physicians and Surgeons, New York, New York
2. Department of Neurosurgery, Neurological Intensive Care Unit, Columbia University College of Physicians and Surgeons, New York, New York
3. Department of Surgery, University of Chicago, Chicago, Illinois
4. Departments of Neurology and Neurosurgery, Neurological Intensive Care Unit, Columbia University College of Physicians and Surgeons, New York, New York