1. Department of Surgery, The Johns Hopkins Hospital, Baltimore, MD, USA
2. R Adams Cowley Shock Trauma Center, University of Maryland Medical System, Baltimore, MD, USA
3. St Mary’s Medical Center, West Palm Beach, FL, USA; Florida Atlantic University, Boca Raton, FL, USA
4. The University of Alabama at Birmingham, Birmingham, AL, USA
5. University of Tennessee Health Science Center, Memphis, TN, USA
6. University of Florida, Jacksonville, FL, USA
7. University of California, San Francisco, CA, USA