1. Division of General Internal Medicine and Health Services Research, Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California
2. Centers for Disease Control and Prevention, Atlanta, Georgia
3. Division of Research, Kaiser Permanente, Oakland, California
4. Department of Health Policy and Administration, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
5. Center for Health Services Research in Primary Care, Durham VAMC, Durham, North Carolina
6. Deep South Center on Effectiveness at Birmingham VA Medical Center and Department of Preventive Medicine University of Alabama at Birmingham, Birmingham, Alabama
7. Department of Epidemiology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland
8. University of Medicine and Dentistry of New Jersey Continuing and Outreach Education, New Brunswick, New Jersey
9. Pacific Health Research Institute, Honolulu, Hawaii
10. Departments of Medicine and Obstetrics-Gynecology, University of Michigan, Ann Arbor, Michigan