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