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Susumu MITSUHASHI
Department of Microbiology, School of Medicine, Gunma University
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Masaya KAWAKAMI
Department of Microbiology, School of Medicine, Gunma University
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Yuzo YAMAGUCHI
Department of Microbiology, School of Medicine, Gunma University
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Masahiko NAGAI
Department of Microbiology, School of Medicine, Gunma University