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Open-Access Journal
Review
Jia-Sheng Cao, Zi-Yi Lu, Ming-Yu Chen, Bin Zhang, Sarun Juengpanich, Jia-Hao Hu, Shi-Jie Li, Win Topatana, Xue-Yin Zhou, Xu Feng, Ji-Liang Shen, Yu Liu, Xiu-Jun Cai 
World J Gastroenterol 27(16):1664-1690. Published online Apr 28, 2021. doi: 10.3748/wjg.v27.i16.1664
Daniel Castaneda, Adalberto Jose Gonzalez, Mohammad Alomari, Kanwarpreet Tandon, Xaralambos Bobby Zervos 
World J Gastroenterol 27(16):1691-1715. Published online Apr 28, 2021. doi: 10.3748/wjg.v27.i16.1691
Minireviews
Mohammed Al-Beltagi, Nermin Kamal Saeed, Adel Salah Bediwy, Yasser El-Sawaf 
World J Gastroenterol 27(16):1716-1727. Published online Apr 28, 2021. doi: 10.3748/wjg.v27.i16.1716
Alessandra Mangia, Rosa Cotugno, Giovanna Cocomazzi, Maria Maddalena Squillante, Valeria Piazzolla 
World J Gastroenterol 27(16):1728-1737. Published online Apr 28, 2021. doi: 10.3748/wjg.v27.i16.1728
Isabela Macedo Lopes Vasques-Monteiro, Vanessa Souza-Mello 
World J Gastroenterol 27(16):1738-1750. Published online Apr 28, 2021. doi: 10.3748/wjg.v27.i16.1738
Michael Yodice, Alexandra Mignucci, Virali Shah, Christopher Ashley, Micheal Tadros 
World J Gastroenterol 27(16):1751-1769. Published online Apr 28, 2021. doi: 10.3748/wjg.v27.i16.1751
Basic Study
Shan Tong, Huan Wang, Li-Sha A, Ta-Na Bai, Ju-Hua Gong, Wen-Jie Jin, Li-Li Dai, Gen-Na Ba, Sung-Bo Cho, Ming-Hai Fu 
World J Gastroenterol 27(16):1770-1784. Published online Apr 28, 2021. doi: 10.3748/wjg.v27.i16.1770
Ling Yuan, Jia-Xin Li, Yi Yang, Yan Chen, Ting-Ting Ma, Shuang Liang, Yang Bu, Lei Yu, Yi Nan 
World J Gastroenterol 27(16):1785-1804. Published online Apr 28, 2021. doi: 10.3748/wjg.v27.i16.1785
Observational Study
Jan Grosek, Hana Zavrtanik, Aleš Tomažič 
World J Gastroenterol 27(16):1816-1827. Published online Apr 28, 2021. doi: 10.3748/wjg.v27.i16.1816
Systematic Reviews
Monica State, Lucian Negreanu, Theodor Voiosu, Andrei Voiosu, Paul Balanescu, Radu Bogdan Mateescu 
World J Gastroenterol 27(16):1828-1840. Published online Apr 28, 2021. doi: 10.3748/wjg.v27.i16.1828
Case Report
Johan F Lock, Stanislaus Reimer, Sebastian Pietryga, Rafael Jakubietz, Sven Flemming, Alexander Meining, Christoph-Thomas Germer, Florian Seyfried 
World J Gastroenterol 27(16):1841-1846. Published online Apr 28, 2021. doi: 10.3748/wjg.v27.i16.1841
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