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Hiroshi Kohno, Hirotaka Kouno, Atsushi Yamaguchi, Hiroki Imagawa, Sumio Iio, Tomoyuki Nishimura, Yuki Miyasako, Takeshi Takasago, Yuki Sumida, Ryoichi Miura, Toshiki Yamaguchi, Toshio Kuwai, Hiroki Fujikawa 
World J Gastrointest Endosc 10(3):69-73. Published online Mar 16, 2018. doi: 10.4253/wjge.v10.i3.69