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 Parasitology, Faculty of Medicine, Khon Kaen University, KhonKaen, Thailand.
5 Faculty of Medical Technology, Nakhonratchasima College, Nakhonratchasima, Thailand.
6 Graduate School of Health Science, Suzuka University of Medical Science, Suzuka, Japan.
7 Center for Research and Development of Medical Diagnostic Laboratories, Faculty of Associated Medical Sciences, KhonKaen University, KhonKaen, Thailand.