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Yukio YAMAZI
Department of Hygiene and Bacteriology, National Hygienic Laboratory
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Tsuneo KOZIMA
Department of Hygiene and Bacteriology, National Hygienic Laboratory
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Tsuyoshi SHIBA
Department of Hygiene and Bacteriology, National Hygienic Laboratory
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Tiuichi ISHIZEKI
Department of Hygiene and Bacteriology, National Hygienic Laboratory
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Sadayoshi HATTA
Department of Hygiene, Nihon Medical School