1. Hanoi University of Public Health, Hanoi, Vietnam
2. Hanoi Medical University, Hanoi, Vietnam
3. Vietnam Tobacco Control Fund, Hanoi, Vietnam
4. World Health Organization, Vietnam Office, Hanoi, Vietnam
5. General Statistics Office of Vietnam, Hanoi, Vietnam
6. Ha Tinh Provincial Department of Preventive Medicine, Hatinh City, Vietnam
7. Vietnam Health Environment Management Agency, Ministry of Health of Vietnam, Hanoi, Viet Nam