1. Faculty of Clinical Medicine, Hanoi University of Public Health, Hanoi, Vietnam
2. School of Nursing and Midwifery, Queen’s University Belfast, Medical Biology Centre, Belfast, Northern Ireland
3. Hanoi University, Hanoi, Vietnam
4. Health Management Training Institute, Hanoi University of Public Health, Hanoi, Vietnam
5. Bac Ninh Provincial Centre for Disease Control, Hanoi, Vietnam