1. Division of HIV/AIDS Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia, USA.
2. Oak Ridge Institute for Science and Education, Oak Ridge, Tennessee, USA.
3. School of Nursing and The Center for Sexuality and Health Disparities, University of Michigan, Ann Arbor, Michigan, USA.
4. Department of Medicine, SUNY Downstate Health Sciences University, Brooklyn, New York, USA.
5. Rollins School of Public Health, Emory University, Atlanta, Georgia, USA.