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Ryo Ogawa
Department of Gastroenterology and Hepatology, Yamaguchi University Graduate School of Medicine, Japan
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Jun Nishikawa
Department of Laboratory Science, Yamaguchi University Graduate School of Medicine, Japan
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Tadatoshi Kakimoto
Department of Surgery, Hofu Institute of Gastroenterology, Japan
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Isao Sakaida
Department of Gastroenterology and Hepatology, Yamaguchi University Graduate School of Medicine, Japan