1. Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
2. Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, Thailand
3. Department of Pathology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
4. Department of Forensic Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand