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Open-Access Journal
Minireviews
Priya Grewal, Jawad Ahmad 
World J Gastroenterol 25(46):6704-6712. Published online Dec 14, 2019. doi: 10.3748/wjg.v25.i46.6704
Basic Study
Case Control Study
Retrospective Cohort Study
Youn I Choi, Jun Won Chung, Dong Kyun Park, Kyoung Oh Kim, Kwang An Kwon, Yoon Jae Kim, Ja Young Seo 
World J Gastroenterol 25(46):6743-6751. Published online Dec 14, 2019. doi: 10.3748/wjg.v25.i46.6743
Retrospective Study
Kazuhiro Toriyama, Masahiro Tajika, Tsutomu Tanaka, Makoto Ishihara, Yutaka Hirayama, Sachiyo Onishi, Nobumasa Mizuno, Takamichi Kuwahara, Nozomi Okuno, Shinpei Matsumoto, Eiichi Sasaki, Tetsuya Abe, Yasushi Yatabe, Kazuo Hara, Keitaro Matsuo, Tsuneo Tamaki, Yasumasa Niwa 
World J Gastroenterol 25(46):6767-6780. Published online Dec 14, 2019. doi: 10.3748/wjg.v25.i46.6767
Pei-Pei Xu, Xiao-Pan Chang, Xi Zhang, Shui-Qing Chi, Guo-Qing Cao, Shuai Li, De-Hua Yang, Xiang-Yang Li, Shao-Tao Tang 
World J Gastroenterol 25(46):6781-6789. Published online Dec 14, 2019. doi: 10.3748/wjg.v25.i46.6781
Randomized Controlled Trial
So Jeong Kim, Jun-Won Chung, Hyun Sun Woo, Su Young Kim, Jung Ho Kim, Yoon Jae Kim, Kyoung Oh Kim, Kwang An Kwon, Dong Kyun Park 
World J Gastroenterol 25(46):6790-6798. Published online Dec 14, 2019. doi: 10.3748/wjg.v25.i46.6790
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