1. Department of Surgery; David Geffen School of Medicine at the University of California; Los Angeles CA
2. Robert Wood Johnson Clinical Scholars Program; University of California; Los Angeles CA
3. VA Greater Los Angeles Healthcare System; Los Angeles CA
4. Department of Medicine; Division of General Internal Medicine and Health Services Research; David Geffen School of Medicine at the University of California; Los Angeles CA
5. Department of Health Policy and Management; Jonathan and Karin Fielding School of Public Health at the University of California; Los Angeles CA