1. Semmes‐Murphey Clinic Memphis Tennessee USA
2. Department of Neurosurgery The University of Tennessee Health Science Center Memphis Tennessee USA
3. Department of Neurology The University of Tennessee Health Science Center Memphis Tennessee USA
4. Department of Neurosurgery University of Kentucky Lexington Kentucky USA
5. Siemens Medical Solutions Malvern Pennsylvania USA
6. Department of Radiology MidSouth Imaging Memphis Tennessee USA
7. Department of Radiology Baptist Memorial Hospital Memphis Tennessee USA
8. Department of Radiology The University of Tennessee Health Science Center Memphis Tennessee USA
9. Department of Radiology Methodist University Hospital Memphis Tennessee USA
10. Division of Epidemiology Biostatistics and Environmental Health University of Memphis School of Public Health Memphis Tennessee USA