1. Graduate School, Khon Kaen University , Khon Kaen, Thailand
2. Hue College of Medicine and Pharmacy, Hue University , Hue city, Vietnam
3. Faculty of Public Health and Board Committee of Research and Training Center for Enhancing Quality of Life of Working Age People (REQW), Khon Kaen University , Khon Kaen, Thailand
4. Department of Economics, University of North Carolina , Chapel Hill, USA
5. Department of Oncology, Hue Central Hospital , Hue city, Vietnam
6. Institute of Health Policy, Management and Evaluation, University of Toronto , Toronto
Ontario
Canada