1. National Center for Chronic Disease Prevention and Health Promotion, Office on Smoking and Health, Centers for Disease Control and Prevention, Atlanta, Georgia
2. Center for Health Policy Science and Tobacco Research, RTI International, Research Triangle Park, North Carolina
3. Department of Health Policy and Management, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
4. National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Division of HIV/AIDS Prevention-Intervention Research and Support, Centers for Disease Control and Prevention, Atlanta, Georgia