1 WHO Collaborating Centre for Research and Control of Opisthorchiasis (Southeast Asian Liver Fluke Disease), Tropical Disease Research Center, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand. Electronic address: banchob@kku.ac.th.
2 Office of Research Coordination, University of the East; Institute of Biology, College of Science, University of the Philippines Diliman; Department of Biology, College of Arts and Sciences, University of the Philippines Manila; College of Public Health, University of the Philippines Manila; University of the East Ramon Magsaysay Graduate School.
3 Department of Medical Environmental Biology, Chung-Ang University College of Medicine, Seoul, South Korea.
4 Department of Parasitology, Asahikawa Medical University, Asahikawa, Hokkaido, Japan.
5 Department Infectious Disease Epidemiology, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany.