1. Department of Emergency Medicine, Naval Medical Center San Diego , San Diego, CA 92134, USA
2. Combat Trauma Research Group—West, Clinical Investigation Department, Naval Medical Center San Diego , San Diego, 92134, USA
3. Department of Radiology, Naval Medical Center San Diego , San Diego, CA 92134, USA
4. Department of Military and Emergency Medicine, Uniformed Services University of the Health Sciences , Bethesda, MD 20814, USA
5. Department of Emergency Medicine, University of Colorado School of Medicine , Aurora, CO 80045, USA
6. Center for COMBAT Research, Department of Emergency Medicine, University of Colorado School of Medicine , Aurora, CO 80045, USA
7. School of Physics and Astronomy, University of Minnesota , Minneapolis, MN 55455, USA
8. Division of Animal Resources, NMCSD San Diego , San Diego, CA 92134, USA
9. The Emergency Statistician , Idyllwild, CA 92549, USA