1. Department of Neurosurgery, Walter Reed National Military Medical Center, Bethesda, Maryland;
2. Uniformed Services University of the Health Sciences, Bethesda, Maryland;
3. Icahn School of Medicine at Mount Sinai, New York, New York;
4. Darnall Medical Library, Walter Reed National Military Medical Center, Bethesda, Maryland; and
5. Department of Neurosurgery, Naval Medical Readiness Training Command, San Diego, California