1. Department of Microbiology; Aichi Prefectural Institute of Public Health; Nagoya Aichi 462-8576 Japan
2. Department of Bacteriology; Nagoya University Postgraduate School of Medicine; Nagoya Aichi 462-8550 Japan
3. Department of Laboratory Medicine; Hamamatsu University School of Medicine; Hamamatsu Shizuoka 431-3192 Japan
4. Department of Bacteriology; Tokyo Metropolitan Research Laboratory of Public Health; Shinjuku-ku Tokyo 169-0073 Japan
5. Department of Bacteriology; Yamagata Prefectural Institute of Public Health; Yamagata Yamagata 990-0031 Japan
6. Department of Bacteriology; Fukushima Prefectural Institute of Public Health; Fukushima Fukushima 960-8163 Japan
7. Department of Bacteriology and Pathology; Kanagawa Prefectural Public Health Laboratory; Yokohama Kanagawa 241-0815 Japan
8. Department of Bacteriology; Toyama Institute of Health; Toyama 939-0363 Japan
9. Department of Microbiology; Osaka Prefectural Institute of Public Health; Osaka Osaka 537-0025 Japan
10. Division of Biological Medicine; Yamaguchi Prefectural Research Institute of Public Health; Yamaguchi Yamaguchi 753-0821 Japan
11. Department of Bacteriology; Oita Prefectural Institute of Health and Environment; Oita Oita 870-0948 Japan
12. Department of Bacteriology; National Institute of Infectious Diseases; Shinjuku-ku Tokyo 162-8640 Japan