Affiliation: | 1. Niigata University School of Medicine, Niigata 2. Laboratory of Bioorganic Chemistry, Shizuoka College of Pharmacy, Shizuoka 3. Eisai Research Laboratories, Tokyo 4. First Department of Medicine, Univ. of Tokyo, Japan 5. Third Department of Internal Medicine, University of Tokyo, Faculty of Medicine, Tokyo 6. G. I. Labs., Department of Surgery, Gunma University School of Medicine, Maebashi
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