1. Department of Behavioural Sciences & Health Education, Emory University Rollins School of Public Health, Atlanta, GA, USA
2. HIV/AIDS and Harm Reduction Association of Tajikistan, Dushanbe, Tajikistan
3. Hubert Department of Global Health, Emory University Rollins School of Public Health, Atlanta, GA, USA
4. Department of Epidemiology, Emory University Rollins School of Public Health, Atlanta, GA, USA
5. Department of Sociology, Emory College, Emory University, Atlanta, GA, USA
6. School of Public Health, Fudan University, Shanghai, People’s Republic of China