1. Department of Surgery, University of California, Irvine (UCI), Orange, CA, USA
2. Department of Surgery, University of Southern California (USC), Los Angeles, CA, USA
3. Department of Surgery, Cedars-Sinai Medical Center, Los Angeles, CA, USA
4. Department of Surgery, University of California Los Angeles (UCLA), Los Angeles, CA, USA
5. Department of Surgery, Loma Linda University, Loma Linda, CA, USA
6. Riverside University Health System, Moreno Valley, CA, USA
7. Department of Surgery, University of California, San Diego (UCSD), San Diego, CA, USA
8. Department of Surgery, Sharp Memorial Hospital, San Diego, CA, USA
9. Trauma Department, Scripps Memorial Hospital La Jolla, La Jolla, CA, USA
10. Department of Surgery, Ventura County Medical Center, Ventura, CA, USA
11. Santa Barbara Cottage Hospital, Santa Barbara, CA, USA