US Army Institute of Surgical Research, JBSA-Fort Sam Houston, San Antonio, Texas. Department of Surgery, School of Medicine, University of Colorado Denver, Aurora. Division of Emergency Medicine, Department of Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania. Department of Radiology, School of Medicine, University of Colorado Denver, Aurora. Department of Health Systems, Management, and Policy, School of Public Health, University of Colorado Denver, Aurora. Department of Emergency Medicine, School of Medicine, University of Colorado Denver, Aurora. Division of Trauma and General Surgery, Department of Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania. Department of Surgery, University of Tennessee Health Science Center, Knoxville. Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee. Department of Surgery, University of Louisville, Louisville, Kentucky. MetroHealth Medical Center, Case Western Reserve University, Cleveland, Ohio. Department of Surgery, Parkland Memorial Hospital, University of Texas Southwestern, Dallas. Texas Health Harris Methodist Hospital, Ft Worth, Texas. Altoona Hospital, University of Pittsburgh Medical Center, Altoona, Pennsylvania.