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Masaki Murata, Mitsushige Sugimoto, Hiromitsu Ban, Taketo Otsuka, Toshiro Nakata, Masahide Fukuda, Osamu Inatomi, Shigeki Bamba, Ryoji Kushima, Akira Andoh 
World J Gastrointest Endosc 9(10):529-534. Published online Oct 16, 2017. doi: 10.4253/wjge.v9.i10.529