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SADAO ONOE
Hokkaido Prefectural Shintoku Animal Husbandry Experiment Station, Shintoku, Hokkaido, Japan
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CHIHIRO SUGIMOTO
Department of Epizootiology, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
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MASAYUKI TANAKA
Division of Veterinary Microbiology, Kyoto Biken Laboratories, Uji, Kyoto, Japan
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SHUICHI KUBOTA
Department of Epizootiology, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
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TSUNAO HIRAI
Hokkaido Prefectural Shintoku Animal Husbandry Experiment Station, Shintoku, Hokkaido, Japan
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HIROMI YONEMICHI
Hokkaido Prefectural Takikawa Animal Husbandry Experiment Station, Takikawa, Hokkaido, Japan
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KIYOKAZU MORI
Hokkaido Prefectural Shintoku Animal Husbandry Experiment Station, Shintoku, Hokkaido, Japan
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MISAO ONUMA
Department of Epizootiology, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido, Japan