1. Graduate School, Khon Kaen University, Khon Kaen, Thailand;
2. Thai Nguyen University of Medicine and Pharmacy, Thai Nguyen, Vietnam;
3. Centre for Research and Development of Medical Diagnostic Laboratories (CMDL), Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand;
4. Faculty of Public Health, Khon Kaen University, Khon Kaen, Thailand