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Katsuo Kumagai
Department of Bacteriology, Tohoku University Medical School, Sendai
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Keizō Miyazaki
Department of Bacteriology, Tohoku University Medical School, Sendai
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Mitsuo Rikimaru
Department of Bacteriology, Tohoku University Medical School, Sendai
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Nakao Ishida
Department of Bacteriology, Tohoku University Medical School, Sendai