1. Economics, Sociology, and Statistics Department, RAND Corporation, Santa Monica, California
2. Drug Policy Research Center, RAND Corporation, Santa Monica, California
3. Department of Social & Behavioral Sciences, Indiana University Richard M. Fairbanks School of Public Health, Indianapolis
4. Program for Addiction Research, Clinical Care, Knowledge and Advocacy, Division of Epidemiology, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City
5. Informatics, Decision-Enhancement, and Analytic Sciences Center, VA Salt Lake City Health Care System, Salt Lake City, Utah
6. Sol Price School of Public Policy and Leonard D. Schaeffer Center for Health Policy & Economics, University of Southern California, Los Angeles
7. Behavioral and Policy Sciences Department, RAND Corporation, Pittsburgh, Pennsylvania