1. Department of Disease Control and Prevention, Pasteur Institute of Ho Chi Minh City, Ho Chi Minh City, Vietnam
2. Center for Population Health Sciences, Hanoi University of Public Health, Hanoi City, Vietnam
3. Center for Population Health Sciences, Vietnam HIV Addiction Technology Transfer Center - University of Medicine and Pharmacy at Ho Chi Minh City, Hanoi City, Vietnam
4. Center for Population Health Sciences, University of Medicine and Pharmacy at Ho Chi Minh City, Hanoi City, Vietnam
5. Center for Population Health Sciences, Prevention HIV/AIDS Center Ho Chi Minh City HIV/AIDS Association, Hanoi City, Vietnam