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Hidefumi FURUOKA
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Akira ANRI
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Yumi ARITA
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Naoto TUZUKI
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Hiroshi SATOH
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Chitoshi ITAKURA
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Author's Organization:Department of Comparative Pathology, Faculty of Veterinary Medicine, Hokkaido University Hokkaido Prefectural Federation of Agricultural Mutual Aid Association Department of Comparative Pathology, Faculty of Veterinary Medicine, Hokkaido University Department of Comparative Pathology, Faculty of Veterinary Medicine, Hokkaido University Department of Comparative Pathology, Faculty of Veterinary Medicine, Hokkaido University Department of Comparative Pathology, Faculty of Veterinary Medicine, Hokkaido University