1. Department of Surgery, Division of Trauma and General Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania
2. Department of Emergency Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
3. Department of Critical Care Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
4. Department of Surgery, University of Tennessee Health Science Center, Knoxville, Tennessee
5. Department of Surgery, University of Texas Health San Antonio, San Antonio, Texas
6. Department of Surgery, JPS Health Network, Fort Worth, Texas
7. Department of Surgery, University of Utah, Salt Lake City, Utah
8. Department of Surgery, University of Louisville, Louisville, Kentucky
9. Department of Surgery, Metro Health Medical Center, Case Western Reserve University, Cleveland, Ohio
10. Department of Surgery, University of Texas Southwestern, Dallas, Texas
11. Department of Surgery, University of Arizona, Tucson, Arizona