1. Department of Disease Control and Prevention, Pasteur Institute of Ho Chi Minh City, Ho Chi Minh City, Vietnam
2. Center for Population Health Science, Hanoi University of Public Health, Hanoi, Vietnam
3. Vietnam HIV Addiction Technology Transfer Center, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
4. Faculty of Public Health, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
5. Training and Scientific Research, University Medical Center, Ho Chi Minh City, Vietnam
6. Interactive Research and Development, Ho Chi Minh City, Vietnam
7. Woolcock Institute of Medical Research, Ho Chi Minh City, Vietnam
8. Prevention HIV/AIDS Center Ho Chi Minh City HIV/AIDS Association, Ho Chi Minh City, Vietnam