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Minireviews
Retrospective Cohort Study
Retrospective Study
Yutaka Hirayama, Takafumi Ando, Hidemi Goto, Takeshi Yamamura, Masanao Nakamura, Ryoji Miyahara, Osamu Watanabe, Yoshiki Hirooka 
World J Gastrointest Endosc 8(6):301-309. Published online Mar 25, 2016. doi: 10.4253/wjge.v8.i6.301
Systematic Reviews
Anthony Yuen Bun Teoh, Vinay Dhir, Zhen-Dong Jin, Mitsuhiro Kida, Dong Wan Seo, Khek Yu Ho 
World J Gastrointest Endosc 8(6):310-318. Published online Mar 25, 2016. doi: 10.4253/wjge.v8.i6.310
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