1. Division of Traumatology, Surgical Critical Care and Emergency Surgery, Perelman School of Medicine at the University of Pennsylvania, Philadelphia
2. currently affiliated with Division of Acute Care Surgery and Trauma, University of Rochester Medical Center, Rochester, New York
3. Department of Surgery, Perelman School of Medicine at the University of Pennsylvania, Philadelphia
4. currently affiliated with Department of Surgery, Stanford University, Palo Alto, California
5. medical student, Perelman School of Medicine at the University of Pennsylvania, Philadelphia
6. Department of Anesthesia and Critical Care, Perelman School of Medicine at the University of Pennsylvania, Philadelphia