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Minoru KAMIZONO
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Shin-ichiro KONISHI
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Manabau OGATA
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Susumu KOBORI
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Author's Organization:Laboratory of Infectious Diseases of Animals,College of Agriculture and Veterinary Medicine,Nihon University Department of Veterinary Microbiology,Faculty of Agriculture,University of Tokyo Department of Veterinary Microbiology,Faculty of Agriculture,University of Tokyo Laboratory of Infectious Diseases of Animals,College of Agriculture and Veterinary Medicine,Nihon University