1. Kaiser Permanente Washington Health Research Institute, Seattle
2. Department of Health Systems and Population Health, University of Washington, Seattle
3. Center for the Clinical Trials Network, National Institute on Drug Abuse, National Institutes of Health, Bethesda, Maryland
4. Center of Excellence in Substance Addiction Treatment and Education, Veteran Affairs Puget Sound Health Care System, Seattle, Washington
5. Kaiser Permanente Colorado Institute for Health Research, Denver
6. Colorado Permanente Medical Group, Denver
7. Kaiser Permanente Northern California Division of Research, Oakland
8. Johns Hopkins University School of Medicine, Baltimore, Maryland
9. Addictions, Drug & Alcohol Institute, University of Washington, Seattle
10. Price School of Public Policy, University of Southern California, Los Angeles
11. Leonard D Schaeffer Center for Health Policy & Economics, University of Southern California, Los Angeles
12. Kaiser Permanente Mid-Atlantic Permanente Research Institute, North Bethesda, Maryland
13. Department of Family Medicine, Oregon Health & Science University, Portland
14. Medical University of South Carolina College of Medicine, Charleston
15. Department of Medicine, University of Washington, Seattle