1. Qualiative research, Woolcock Institute of Medical Research, Ha Noi, Viet Nam
2. Sydney School of Public Health, Faculty of Medicine and Health, University of Sydney, Sydney, Australia
3. Department of Clinical Pharmacology, Hanoi University of Pharmacy, Ha Noi, Viet Nam
4. Department of Medical Service Administration, Ministry of Health, Ha Noi, Viet Nam
5. Department of Planning and International Cooperation, National Institute of Hygiene and Epidemiology, Ha Noi, Viet Nam
6. Central Clinical School, Faculty of Medicine and Health, University of Sydney, Sydney, Australia
7. Department of Global Health and Development, London School of Hygiene and Tropical Medicine, London, UK