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Open-Access Journal
Retrospective Study
Akira Andoh, Shigeki Bamba, Osamu Inatomi, Atsushi Nishida, Masaki Murata, Toshiro Nakata, Hiromitsu Ban, Mitsushige Sugimoto, Taketo Otsuka 
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
José Celso Ardengh, José Sebastião dos Santos, Rafael Kemp, César Vivian Lopes 
World J Gastrointest Endosc 10(5):99-108. Published online May 16, 2018. doi: 10.4253/wjge.v10.i5.99
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