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YOICHI HAYAKAWA
Pharmaceutical Laboratory, Kirin Brewery Co., Ltd.
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TAKAFUMI IWAKIRI
Pharmaceutical Laboratory, Kirin Brewery Co., Ltd.
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KANJI IMAMURA
Pharmaceutical Laboratory, Kirin Brewery Co., Ltd.
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HARUO SETP
Institute of Applied Microbiology, The University of Tokyo
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NOBORU OTAKE
Present address: Department of Bioscience and Biotechnology, Teikyo University Institute of Applied Microbiology, The University of Tokyo