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Kokichi Hamada
Division of Microbiology, Hyogo Prefectural Institute of Public Health, Japan
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Hidetaka Tsuji
Division of Microbiology, Hyogo Prefectural Institute of Public Health, Japan
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Hidemasa Izumiya
Department of Bacteriology, National Institute of Infectious Diseases, Japan
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Haruo Watanabe
Department of Bacteriology, National Institute of Infectious Diseases, Japan