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Open-Access Journal
Frontier
Alain Couvineau, Thierry Voisin, Pascal Nicole, Valerie Gratio, Anne Blais 
World J Gastroenterol 27(44):7582-7596. Published online Nov 28, 2021. doi: 10.3748/wjg.v27.i44.7582
Opinion Review
Alberto Tringali, Deborah Costa, Alessandro Fugazza, Matteo Colombo, Kareem Khalaf, Alessandro Repici, Andrea Anderloni 
World J Gastroenterol 27(44):7597-7611. Published online Nov 28, 2021. doi: 10.3748/wjg.v27.i44.7597
Evidence Review
Review
Muhammad Raheel Anjum, Jodie Chalmers, Rizwana Hamid, Neil Rajoriya 
World J Gastroenterol 27(44):7625-7648. Published online Nov 28, 2021. doi: 10.3748/wjg.v27.i44.7625
Minireviews
Simone Antunes Terra, Anderson Cesar Gonçalves, Pedro Luiz Toledo de Arruda Lourenção, Maria Aparecida Marchesan Rodrigues 
World J Gastroenterol 27(44):7649-7660. Published online Nov 28, 2021. doi: 10.3748/wjg.v27.i44.7649
Amit Kumar Dutta, Perminder Singh Phull 
World J Gastroenterol 27(44):7661-7668. Published online Nov 28, 2021. doi: 10.3748/wjg.v27.i44.7661
Basic Study
Chang-Ju Zhu, Wan-Guang Yang, De-Jian Li, Yao-Dong Song, San-Yang Chen, Qiao-Fang Wang, Yan-Na Liu, Yan Zhang, Bo Cheng, Zhong-Wei Wu, Zong-Chao Cui 
World J Gastroenterol 27(44):7669-7686. Published online Nov 28, 2021. doi: 10.3748/wjg.v27.i44.7669
Observational Study
Jia-Jia Lv, Wen Su, Xiao-Yan Chen, Yi Yu, Xu Xu, Chun-Di Xu, Xing Deng, Jie-Bin Huang, Xin-Qiong Wang, Yuan Xiao 
World J Gastroenterol 27(44):7705-7715. Published online Nov 28, 2021. doi: 10.3748/wjg.v27.i44.7705
Systematic Reviews
Agastya Patel, Piotr Spychalski, Magdalena Antoszewska, Jaroslaw Regula, Jarek Kobiela 
World J Gastroenterol 27(44):7716-7733. Published online Nov 28, 2021. doi: 10.3748/wjg.v27.i44.7716
Letter to the Editor
Ricardo Wesley Alberca, Gil Benard, Gabriela Gama Freire Alberca, Maria Notomi Sato 
World J Gastroenterol 27(44):7734-7738. Published online Nov 28, 2021. doi: 10.3748/wjg.v27.i44.7734
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