1. Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
2. Center of Excellence (Emerging and Re-emerging Diarrheal Viruses), Chiang Mai University, Chiang Mai, Thailand
3. Department of Developmental Medical Sciences, The University of Tokyo, School of International Health, Graduate School of Medicine, Tokyo, Japan
4. Department of Pathology and Microbiology, Nihon University School of Medicine, Tokyo, Japan