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Open-Access Journal
Frontier
Adriana Ahumada, Laura Rayón, Clara Usón, Rafael Bañares, Sonia Alonso Lopez 
World J Gastroenterol 27(40):6737-6749. Published online Oct 28, 2021. doi: 10.3748/wjg.v27.i40.6737
Opinion Review
Evidence Review
Antoni Stadnicki, Izabela Stadnicka 
World J Gastroenterol 27(40):6757-6774. Published online Oct 28, 2021. doi: 10.3748/wjg.v27.i40.6757
Review
Lorena Ostios-Garcia, Julia Villamayor, Esther Garcia-Lorenzo, David Vinal, Jaime Feliu 
World J Gastroenterol 27(40):6775-6793. Published online Oct 28, 2021. doi: 10.3748/wjg.v27.i40.6775
Paul T Kröner, Megan ML Engels, Benjamin S Glicksberg, Kipp W Johnson, Obaie Mzaik, Jeanin E van Hooft, Michael B Wallace, Hashem B El-Serag, Chayakrit Krittanawong 
World J Gastroenterol 27(40):6794-6824. Published online Oct 28, 2021. doi: 10.3748/wjg.v27.i40.6794
Minireviews
Charles E Hill, Luca Biasiolli, Matthew D Robson, Vicente Grau, Michael Pavlides 
World J Gastroenterol 27(40):6825-6843. Published online Oct 28, 2021. doi: 10.3748/wjg.v27.i40.6825
Carly Jade Carter, Ahmed H Mekkawy, David L Morris 
World J Gastroenterol 27(40):6844-6860. Published online Oct 28, 2021. doi: 10.3748/wjg.v27.i40.6844
Anand V Kulkarni, Nageshwar Reddy Duvvuru 
World J Gastroenterol 27(40):6861-6873. Published online Oct 28, 2021. doi: 10.3748/wjg.v27.i40.6861
Benjamin Tharian, Sumant Inamdar, Saurabh Chandan, Abhilash Perisetti, Hemant Goyal, Rupinder Mann 
World J Gastroenterol 27(40):6874-6887. Published online Oct 28, 2021. doi: 10.3748/wjg.v27.i40.6874
Basic Study
Mo-Fei Wang, Song-Song Zhao, Dil Momin Thapa, Yu-Ling Song, Zheng Xiang 
World J Gastroenterol 27(40):6888-6907. Published online Oct 28, 2021. doi: 10.3748/wjg.v27.i40.6888
Xue-Ke Zhao, Yang Liu, Yong-Mei Liu, Juan-Juan Zhu, Bao-Fang Zhang, Hong Li, Gao-Liang Zou, Rui-Han Hu, Tao Huang, Ming-Liang Cheng, Ming-Yu Zhou 
World J Gastroenterol 27(40):6908-6926. Published online Oct 28, 2021. doi: 10.3748/wjg.v27.i40.6908
Retrospective Cohort Study
Xiu-Mei Chi, Xiao-Mei Wang, Zhong-Feng Wang, Rui-Hong Wu, Xiu-Zhu Gao, Hong-Qin Xu, Yan-Hua Ding, Jun-Qi Niu 
World J Gastroenterol 27(40):6927-6938. Published online Oct 28, 2021. doi: 10.3748/wjg.v27.i40.6927
Jasmin Schuhbaur, Melissa Schweizer, Jana Philipp, Julian Schmidberger, Patrycja Schlingeloff, Wolfgang Kratzer 
World J Gastroenterol 27(40):6939-6950. Published online Oct 28, 2021. doi: 10.3748/wjg.v27.i40.6939
Observational Study
Hend Ibrahim Shousha, Shimaa Afify, Rabab Maher, Noha Asem, Eman Fouad, Ehab F Mostafa, Mohammed A Medhat, Amr Abdalazeem, Hazem Elmorsy, Miriam M Aziz, Rateba S Mohammed, Mohamed Ibrahem, Hassan Elgarem, Dalia Omran, Mohamed Hassany, Bassem Elsayed, Ahmed Y Abdelaziz, Mohamed El Kassas 
World J Gastroenterol 27(40):6951-6966. Published online Oct 28, 2021. doi: 10.3748/wjg.v27.i40.6951
Sami Akbulut, Ali Ozer, Hasan Saritas, Sezai Yilmaz 
World J Gastroenterol 27(40):6967-6984. Published online Oct 28, 2021. doi: 10.3748/wjg.v27.i40.6967
Meta-Analysis
Eszter Boros, Zoltán Sipos, Péter Hegyi, Brigitta Teutsch, Levente Frim, Szilárd Váncsa, Szabolcs Kiss, Fanni Dembrovszky, Eduard Oštarijaš, Andrew Shawyer, Bálint Erőss 
World J Gastroenterol 27(40):6985-6999. Published online Oct 28, 2021. doi: 10.3748/wjg.v27.i40.6985
Letter to the Editor
Rossella Sica, Serena Pennoni, Laura Penta, Sara Riccioni, Giuseppe Di Cara, Alberto Verrotti 
World J Gastroenterol 27(40):7000-7004. Published online Oct 28, 2021. doi: 10.3748/wjg.v27.i40.7000
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