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Open-Access Journal
Review
Minireviews
Elodie Zocola, Jeremy Meyer, Niki Christou, Emilie Liot, Christian Toso, Nicolas Christian Buchs, Frédéric Ris 
World J Gastroenterol 27(31):5189-5200. Published online Aug 21, 2021. doi: 10.3748/wjg.v27.i31.5189
Anusri Kadakuntla, Ankit Juneja, Samantha Sattler, Anusha Agarwal, Drishti Panse, Nardin Zakhary, Anusha Pasumarthi, Lee Shapiro, Micheal Tadros 
World J Gastroenterol 27(31):5201-5218. Published online Aug 21, 2021. doi: 10.3748/wjg.v27.i31.5201
Basic Study
Ilias Gountas, Ioanna Yiasemi, Evi Kyprianou, Christos Mina, Chrysanthos Georgiou, Petros Katsioloudes, Andri Kouroufexi, Anna Demetriou, Elena Xenofontos, Georgios Nikolopoulos 
World J Gastroenterol 27(31):5219-5231. Published online Aug 21, 2021. doi: 10.3748/wjg.v27.i31.5219
Clinical and Translational Research
Sheng-Bing Zhao, Wei Yang, Shu-Ling Wang, Peng Pan, Run-Dong Wang, Xin Chang, Zhong-Qian Sun, Xing-Hui Fu, Hong Shang, Jian-Rong Wu, Li-Zhu Chen, Jia Chang, Pu Song, Ying-Lei Miao, Shui-Xiang He, Lin Miao, Hui-Qing Jiang, Wen Wang, Xia Yang, Yuan-Hang Dong, Han Lin, Yan Chen, Jie Gao, Qian-Qian Meng, Zhen-Dong Jin, Zhao-Shen Li, Yu Bai 
World J Gastroenterol 27(31):5232-5246. Published online Aug 21, 2021. doi: 10.3748/wjg.v27.i31.5232
Case Control Study
Retrospective Study
Observational Study
Christian Balamou, Akoï Koïvogui, Christelle M Rodrigue, Aurélie Clerc, Claire Piccotti, Anne Deloraine, Catherine Exbrayat 
World J Gastroenterol 27(31):5272-5287. Published online Aug 21, 2021. doi: 10.3748/wjg.v27.i31.5272
Case Report