1. Department of Pathologic Analysis, Division of Medical Life Sciences, Hirosaki University Graduate School of Health Sciences, 66-1, Hon-cho, Hirosaki-shi, Aomori 036-8564, Japan
2. Aomori Prefecture Public Health and Environment Center, 1-1-1, Higashitsukurimichi, Aomori-shi, Aomori 030-8566, Japan
3. Gunma Prefectural Institute of Public Health and Environmental Sciences, 378 Kamioki-machi, Maebashi-shi, Gunma 371-0052, Japan
4. Infectious Disease Surveillance Center, National Institute of Infectious Diseases, 4-7-1 Gakuen, Musashimurayama-shi, Tokyo 208-0011, Japan
5. Research Institute for Environmental Sciences and Public Health of Iwate Prefecture, 1-11-16, Kitaiioka, Morioka-shi, Iwate 020-0857, Japan
6. Division of Virology, Kawasaki City Institute for Public Health, 3-25-13, Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa 210-0821, Japan
7. Department of Molecular Biodefence Research, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama-shi, Kanagawa 236-0004, Japan
8. Pathogen Genomics Center, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan