1. Department of Diagnostic Radiology and Nuclear Medicine, University of Maryland School of Medicine, Baltimore, Maryland.
2. Department of Environmental Health Sciences, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland.
3. Department of Neurosurgery, University of Maryland School of Medicine, Baltimore, Maryland.
4. Department of Rehabilitation Services, University of Maryland School of Medicine, Baltimore, Maryland.
5. Aeromedical Research Department, U.S. Air Force School of Aerospace Medicine, Center for the Sustainment of Trauma and Readiness Skills, Baltimore, Maryland.
6. R. Adams Cowley Shock Trauma Center, University of Maryland School of Medicine, Baltimore, Maryland.