1. Medical University of South Carolina, Department of Neurosciences, Division of Neurosurgery, Charleston, South Carolina
2. Stony Brook University Medical Center, Department of Neurosurgery, Stony Brook, New York
3. University of San Diego, Department of Neurosurgery, San Diego, California
4. University of Tennessee, Department of Radiology, Memphis, Tennessee
5. Medical University of South Carolina, Department of Radiology and Radiological Sciences, Charleston, South Carolina