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Hirofumi NAGAI
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Akio SATO
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Naoaki GOTO
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Kosaku FUJIWARA
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Author's Organization:Department of Veterinary Pathology, Faculty of Agriculture, Yamaguchi University Department of Veterinary Pathology, Faculty of Agriculture, Yamaguchi University Department of Veterinary Pathology, Faculty of Agriculture, University of Tokyo Department of Veterinary Pathology, Faculty of Agriculture, University of Tokyo