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Open-Access Journal
Retrospective Study
Taketo Otsuka, Mitsushige Sugimoto, Hiromitsu Ban, Toshiro Nakata, Masaki Murata, Atsushi Nishida, Osamu Inatomi, Shigeki Bamba, Akira Andoh 
World J Gastrointest Endosc 10(5):83-92. Published online May 16, 2018. doi: 10.4253/wjge.v10.i5.83
Observational Study
Barbara Braden, Andreas Koutsoumpas, Michael A Silva, Zahir Soonawalla, Christoph F Dietrich 
World J Gastrointest Endosc 10(5):93-98. Published online May 16, 2018. doi: 10.4253/wjge.v10.i5.93
Prospective Study
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