1. Department of Surgery, Division of Neurosurgery, The North Shore University Hospital, Manhasset, New York, and The Cornell Medical College, New York, New York
2. Department of Radiology, Division of Neuroradiology, The North Shore University Hospital, Manhasset, New York, and The Cornell Medical College, New York, New York
3. Department of Neurology, The North Shore University Hospital, Manhasset, New York, and The Cornell Medical College, New York, New York