1. Thailand-Japan Research Collaboration Center on Emerging and Re-emerging Infections, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan.
2. Phayao Provincial Hospital, Phayao, Thailand.
3. Chiang Kham General Hospital, Phayao, Thailand.
4. Phayao Public Health Office, Phayao, Thailand.
5. Food Safety Operation Center, Nonthaburi, Thailand.
6. Global Collaboration Center, Osaka University, Osaka, Japan.
7. Department of Clinical Epidemiology and Biostatistics, Graduate School of Medicine, Osaka University, Osaka, Japan.
8. Institute of Statistical Mathematics, Tokyo, Japan.
9. Faculty of Public Health, Kasetsart University Chalermphrakiat Sakon Nakhon Campus, Sakon Nakhon, Thailand.
10. National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand.
11. Department of Infection Control and Prevention, Graduate School of Medicine, Osaka University, Osaka, Japan.
12. Infectious Disease Surveillance Center, National Institute of Infectious Disease, Tokyo, Japan.