1. Faculty of Medicine, Cholangiocarcinoma Research Institute (CARI), Khon Kaen University, Khon Kaen, Thailand;
2. Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand;
3. Faculty of Medicine, Imperial College London, London, United Kingdom;
4. Evolution and Paleontology, State Museum of Natural History Karlsruhe, Karlsruhe, Germany