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Keishi Komori, Kazuya Akahoshi, Yoshimasa Tanaka, Yasuaki Motomura, Masaru Kubokawa, Soichi Itaba, Terumasa Hisano, Takashi Osoegawa, Naotaka Nakama, Risa Iwao, Masafumi Oya, Kazuhiko Nakamura 
World J Gastrointest Endosc 4(1):17-21. Published online Jan 16, 2012. doi: 10.4253/wjge.v4.i1.17