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Open-Access Journal
Editorial
Guideline Interpretation
Natacha Bordry, Christoforos Astaras, Marie Ongaro, Nicolas Goossens, Jean Louis Frossard, Thibaud Koessler 
World J Gastroenterol 27(28):4493-4503. Published online Jul 28, 2021. doi: 10.3748/wjg.v27.i28.4493
Review
Minireviews
Alberto E Muñoz, Florencia D Pollarsky, Mónica Marino, Mariano Cartier, Horacio Vázquez, Pablo Salgado, Gustavo Romero 
World J Gastroenterol 27(28):4639-4652. Published online Jul 28, 2021. doi: 10.3748/wjg.v27.i28.4639
Xuan-Ke Ji, Sailaja Vatsalya Madhurapantula, Gui He, Kun-Yan Wang, Chun-Hua Song, Jian-Ying Zhang, Kai-Juan Wang 
World J Gastroenterol 27(28):4653-4666. Published online Jul 28, 2021. doi: 10.3748/wjg.v27.i28.4653
Basic Study
Ting Liu, Xiao-Li Xie, Xue Zhou, Sheng-Xiong Chen, Yi-Jun Wang, Lin-Ping Shi, Shu-Jia Chen, Yong-Juan Wang, Shu-Ling Wang, Jiu-Na Zhang, Shi-Ying Dou, Xiao-Yu Jiang, Ruo-Lin Cui, Hui-Qing Jiang 
World J Gastroenterol 27(28):4667-4686. Published online Jul 28, 2021. doi: 10.3748/wjg.v27.i28.4667
Retrospective Study
Han Ah Lee, Yoo Ra Lee, Young-Sun Lee, Young Kul Jung, Ji Hoon Kim, Hyunggin An, Hyung Joon Yim, Yoon Tae Jeen, Jong Eun Yeon, Kwan Soo Byun, Yeon Seok Seo 
World J Gastroenterol 27(28):4687-4696. Published online Jul 28, 2021. doi: 10.3748/wjg.v27.i28.4687
Clinical Trials Study
Observational Study
Case Report
Yoshifumi S Hirokawa, Takashi Iwata, Yoshinaga Okugawa, Koji Tanaka, Hiroyuki Sakurai, Masatoshi Watanabe 
World J Gastroenterol 27(28):4738-4745. Published online Jul 28, 2021. doi: 10.3748/wjg.v27.i28.4738