1. Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC, USA
2. Center for Interdisciplinary Research on AIDS, Yale University. New Haven, CT, USA
3. Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
4. Department of Health Behavior, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
5. Department of Social Medicine, Center for Health Equity Research, University of North Carolina at Chapel Hill, 333 S. Columbia St., Chapel Hill, NC, USA
6. The Craig Dalsimer Division of Adolescent Medicine, The Children’s Hospital of Philadelphia, Philadelphia, PA, USA