1. Pacific Institute for Research and Evaluation, Chapel Hill Center; 1516 E. Franklin Street Suite 200 27514 Chapel Hill NC USA
2. Pacific Institute for Research and Evaluation, Prevention Research Center; 1995 University Avenue Suite 450 94704 Berkeley CA USA
3. Oregon Research Institute; 1715 Franklin Blvd 97403 Eugene OR USA
4. Odum Institute for Social Science; Manning Hall, CB 3355, University of North Carolina at Chapel Hill 27599 Chapel Hill NC USA
5. Oregon Health Authority, Addiction and Mental Health Division; 500 Summer Street NE, E-86 97301 Salem OR USA