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Tomoya Iida
Department of Gastroenterology, Otaru City General Hospital, Japan
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Takashi Yabana
Department of Gastroenterology, Otaru City General Hospital, Japan
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Suguru Nakagaki
Department of Gastroenterology, Otaru City General Hospital, Japan
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Takeya Adachi
Department of Gastroenterology, Otaru City General Hospital, Japan