1. Department of Neurological Surgery, Naval Medical Center San Diego, California;
2. Department of Neurosurgery, UCSF Medical Center, San Francisco, California;
3. N9 Medical, Navy Operational Support Center Washington, DC, Joint Base Andrews, Maryland;
4. Department of Neurosurgery, Loma Linda University Health, Loma Linda, California; and
5. 3D Medical Applications Center, Department of Radiology, Walter Reed National Military Medical Center, Bethesda, Maryland