1. Department of Health Law, Policy and Management, Boston University, Boston, Massachusetts, USA
2. National Institute on Drug Abuse, Bethesda, Maryland, USA
3. Columbia University, New York, New York, USA
4. Department of Communication, University of Kentucky, Lexington, Kentucky, USA
5. The Ohio State University, Columbus, Ohio, USA
6. Oak Ridge Associated Universities, Oak Ridge, Tennessee, USA
7. RTI International, Research Triangle Park, Research Triangle Park, North Carolina, USA