1. Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
2. Division of Experimental Animal Research, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
3. Department of Virology I, National Institute of Infectious Diseases, Tokyo, Japan
4. Department of Rheumatology and Clinical Immunology, Clinical Research Center for Allergy and Rheumatology, Sagamihara National Hospital, National Hospital Organization, Kanagawa, Japan
5. Institute of Molecular Biosciences, Mahidol University, Salaya, Nakhon Pathom, Thailand
6. Kanagawa Prefectural Institute of Public Health, Kanagawa, Japan
7. National Institute of Infectious Diseases, Tokyo, Japan