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Keita Uehara
Department of Gastroenterology, National Hospital Organization, Tochigi, Hospital
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Nobuhiko Kato
Department of Internal Medicine, National Hospital Organization, Tochigi, Hospital
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Takeo Hashimoto
Department of Surgery, National Hospital Organization, Tochigi, Hospital
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Seiichi Nakayama
Department of Internal Medicine, National Hospital Organization, Tochigi, Hospital