1. Division of General Internal Medicine, Cedars-Sinai Medical Center, Los Angeles, California
2. RAND Corporation, Santa Monica, California
3. Department of Health Policy and Management, UCLA (University of California, Los Angeles), Fielding School of Public Health
4. UCLA Center for Health Policy Research, UCLA Fielding School of Public Health
5. Division of General Internal Medicine and Health Services Research, David Geffen School of Medicine at UCLA, Los Angeles