Sato Yasuhiro, Takahashi Yasuo, Nishiie Kiwami, Okubo Shuniti, Fujikaw Koji, Shintani Naoaki, Takada Koichi, Sato Yasushi, Takimoto Rishu, Kato Junji, Niitsu Yoshiro
Department of Gastroenterology, National Hospital Organization Hokkaido Cancer Center.
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