1. Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
2. Veterans Health Administration, Greater Los Angeles Healthcare System, Los Angeles, California, USA
3. National Clinician Scholars Program, University of California, Los Angeles, Los Angeles, California, USA
4. RAND Corporation, Santa Monica, California, USA
5. US Department of Veterans Affairs, Washington, DC, USA
6. Department of Surgery, VA Pittsburgh Healthcare System, Pittsburgh, Pennsylvania, USA
7. Veterans Health Administration, National Center for Patient Safety, Ann Arbor, Michigan, USA
8. University of Michigan, Ann Arbor, Michigan, USA
9. Olive View–UCLA Medical Center, Sylmar, California, USA