1. Neurotrauma Department, Naval Medical Research Center, Silver Spring, Maryland.
2. The Henry M. Jackson Foundation for the Advancement of Military Medicine Inc., Bethesda, Maryland.
3. Department of Surgery, Uniformed Services University of the Health Sciences, Bethesda, Maryland.
4. Neurosurgery Department, Walter Reed National Military Medical Center, Bethesda, Maryland.
5. Department of Radiology and Medical Imaging, University of Virginia Medical Center, Charlottesville, Virginia.