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Yoshinari Kawahara
Department of Gastroenterology, Oita-ken Kouseiren Tsurumi Hospital, Japan
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Takayuki Nagai
Department of Gastroenterology, Oita-ken Kouseiren Tsurumi Hospital, Japan
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Takashi Abe
Department of Gastroenterology, Oita-ken Kouseiren Tsurumi Hospital, Japan
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Kazunari Murakami
Department of Gastroenterology, Faculty of Medicine, Oita University, Japan