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Open-Access Journal
Opinion Review
Da Zhou, Jian-Gao Fan 
World J Gastroenterol 25(17):2019-2028. Published online May 7, 2019. doi: 10.3748/wjg.v25.i17.2019
Review
Laura Necula, Lilia Matei, Denisa Dragu, Ana I Neagu, Cristina Mambet, Saviana Nedeianu, Coralia Bleotu, Carmen C Diaconu, Mihaela Chivu-Economescu 
World J Gastroenterol 25(17):2029-2044. Published online May 7, 2019. doi: 10.3748/wjg.v25.i17.2029
Minireviews
David Steele, Kondal Kyanam Kabir Baig, Shajan Peter 
World J Gastroenterol 25(17):2045-2057. Published online May 7, 2019. doi: 10.3748/wjg.v25.i17.2045
Moon Kyung Joo, Jong-Jae Park, Hoon Jai Chun 
World J Gastroenterol 25(17):2058-2070. Published online May 7, 2019. doi: 10.3748/wjg.v25.i17.2058
Basic Study
Jing Zhou, Lu-Yi Wu, Liu Chen, Ya-Jing Guo, Yi Sun, Tao Li, Ji-Meng Zhao, Chun-Hui Bao, Huan-Gan Wu, Yin Shi 
World J Gastroenterol 25(17):2071-2085. Published online May 7, 2019. doi: 10.3748/wjg.v25.i17.2071
Retrospective Study
Xue Yang, Zhi-Jie Xu, Xi Chen, Shuang-Shuang Zeng, Long Qian, Jie Wei, Mei Peng, Xiang Wang, Wan-Li Liu, Hong-Ying Ma, Zhi-Cheng Gong, Yuan-Liang Yan 
World J Gastroenterol 25(17):2099-2109. Published online May 7, 2019. doi: 10.3748/wjg.v25.i17.2099
Observational Study
Leigh R Warren, Jonathan M Clarke, Sonal Arora, Mauricio Barahona, Naila Arebi, Ara Darzi 
World J Gastroenterol 25(17):2122-2132. Published online May 7, 2019. doi: 10.3748/wjg.v25.i17.2122
Thomas Langbein, Wilfried Dathe, Anika Deuerling, Richard P Baum 
World J Gastroenterol 25(17):2133-2143. Published online May 7, 2019. doi: 10.3748/wjg.v25.i17.2133
Case Report
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