1. Department of Neurosurgery, Medical University of South Carolina, Charleston, South Carolina, United States.
2. Department of Radiology, Wake Forest University, Winston-Salem, North Carolina, United States.
3. Department of Neurosurgery, H. Lee Moffitt Cancer Center, Tampa, Florida, United States.
4. Department of Clinical Neurophysiology, Medical University of South Carolina, Charleston, South Carolina, United States.