1. Department of Parasitology, Faculty of Medicine and Research and Diagnostic Center for Emerging Infectious Diseases, Mekong Health Science Research Institute, Khon Kaen University, Khon Kaen, Thailand;
2. Department of Parasitology, National Institute of Infectious Diseases, Ministry of Health, Labour and Welfare, Tokyo, Japan;
3. Department of Microbiology, Immunology and Tropical Medicine, Research Center for Neglected Diseases of Poverty, School of Medicine and Health Science, George Washington University, Washington, District of Columbia