1. Division of Trauma, Burns and Surgical Critical Care, Department of Surgery, University of California, Irvine, Orange, CA, USA
2. Department of Surgery, Stanford University, Palo Alto, CA, USA
3. Division of Trauma and Surgical Critical Care, Department of Surgery, University of Southern California, Los Angeles, CA, USA
4. Department of Anesthesia, University of Southern California, Los Angeles, CA, USA