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K. ITABASHI
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Y. TAZIMA
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T. NISHI
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T. OYAMA
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Author's Organization:National Institute for Infections Discases of Animals, Mukden, Mancoukuo. National Institute for Infections Discases of Animals, Mukden, Mancoukuo. National Institute for Infections Discases of Animals, Mukden, Mancoukuo. National Institute for Infections Discases of Animals, Mukden, Mancoukuo.