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Seiji Futagami
Department of Internal Medicine, Division of Gastroenterology, Nippon Medical School, Japan
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Hiroshi Yamawaki
Department of Internal Medicine, Division of Gastroenterology, Nippon Medical School, Japan
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Satomi Hashimoto
Department of Internal Medicine, Division of Gastroenterology, Nippon Medical School, Japan
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Katsuhiko Iwakiri
Department of Internal Medicine, Division of Gastroenterology, Nippon Medical School, Japan