1. Division of Traumatology, Surgical Critical Care, and Emergency Surgery, Center for Surgery and Health Economics, University of Pennsylvania Perelman School of Medicine, The Leonard Davis Institute of Health Economics, The University of Pennsylvania
2. Department of Surgery, Center for Surgery and Health Economics, The University of Pennsylvania Perelman School of Medicine
3. Department of Anesthesia and critical Care Medicine, The University of Pennsylvania Perelman School of Medicine
4. Division of Traumatology, Surgical Critical Care, and Emergency Surgery, Center for Surgery and Health Economics, University of Pennsylvania Perelman School of Medicine
5. Department of Emergency Medicine, The University of Pennsylvania Perelman School of Medicine
6. Department of Surgery, Center for Surgery and Health Economics, University of Pennsylvania Perelman School of Medicine, The Leonard Davis Institute of Health Economics, The University of Pennsylvania