1. Department of Neurosurgery, University of Utah, Salt Lake City, Utah, United States
2. Department of Rheumatology, University of Utah, Salt Lake City, Utah, United States
3. Department of Radiology, University of Utah, Salt Lake City, Utah, United States
4. Department of Pathology, University of Utah, Salt Lake City, Utah, United States
5. Division of Infectious Diseases, Department of Internal Medicine, University of Utah, Salt Lake City, Utah, United States