1. Department of Bacteriology, National Institute of Infectious Diseases
2. Department of Bacteriology, Fukushima Prefectural Institute of Public Health, Fukushima
3. Department of Microbiology, Kanagawa Prefectural Public Health Laboratory, Kanagawa
4. Department of Bacteriology, Toyama Institute of Health, Toyama
5. Department of Infectious Diseases, Osaka Prefectural Institute of Public Health, Osaka
6. Division of Biological Medicine, Yamaguchi Prefectural Research Institute of Public Health, Yamaguchi
7. Department of Bacteriology, The Oita Prefectural Institute of Health and Environment, Oita, Japan
8. Department of Bacteriology, Tokyo Metropolitan Institute of Public Health, Tokyo