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GUO ZHENG DONG
Department of Biochemistry, Institute for Brain Research, Faculty of Medicine, University of Tokyo, Hongo, Tokyo 113, Japan
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TATSUYA HAGA
Department of Biochemistry, Institute for Brain Research, Faculty of Medicine, University of Tokyo, Hongo, Tokyo 113, Japan
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HIDEJI ITOKAWA
Department of Pharmacology, Tokyo College of Pharmacy, Horinouchi, Hachioji, Tokyo 192-03, Japan
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FUMIO MIZOBE
Department of Applied Biology, Research Center, Taisho Pharmaceutical Co. Ltd., Yoshinocho 1-chome, Ohmiya, Saitama 330, Japan