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Ayumi HIRANO
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Rikio KIRISAWA
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Takashi MATSUBA
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Reiko KOMATSU
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Masayuki TANAKA
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Kiyoshi TAKAHASHI
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Yoshimi KAWAKAMI
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Misao ONUMA
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Author's Organization:School of Veterinary Medicine, Rakuno Gakuen University School of Veterinary Medicine, Rakuno Gakuen University School of Veterinary Medicine, Rakuno Gakuen University School of Veterinary Medicine, Rakuno Gakuen University Division of Veterinary Microbiology, Kyoto Biken Laboratories:Department of Epizootiology, Faculty of Veterinary Medicine, Hokkaido University School of Veterinary Medicine, Rakuno Gakuen University School of Veterinary Medicine, Rakuno Gakuen University Department of Epizootiology, Faculty of Veterinary Medicine, Hokkaido University