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Open-Access Journal
Editorial
Review
Roberto Peltrini, Mauro Podda, Simone Castiglioni, Maria Michela Di Nuzzo, Michele D'Ambra, Ruggero Lionetti, Maurizio Sodo, Gaetano Luglio, Felice Mucilli, Salomone Di Saverio, Umberto Bracale, Francesco Corcione 
World J Gastroenterol 27(38):6374-6386. Published online Oct 14, 2021. doi: 10.3748/wjg.v27.i38.6374
Minireviews
Stephen Safe, Rupesh Shrestha, Kumaravel Mohankumar, Marcell Howard, Erik Hedrick, Maen Abdelrahim 
World J Gastroenterol 27(38):6387-6398. Published online Oct 14, 2021. doi: 10.3748/wjg.v27.i38.6387
Basic Study
Giulia Nannini, Gaia Meoni, Leonardo Tenori, Maria Novella Ringressi, Antonio Taddei, Elena Niccolai, Simone Baldi, Edda Russo, Claudio Luchinat, Amedeo Amedei 
World J Gastroenterol 27(38):6430-6441. Published online Oct 14, 2021. doi: 10.3748/wjg.v27.i38.6430
Retrospective Cohort Study
Masanori Ochi, Ryosuke Kawagoe, Toshiro Kamoshida, Yukako Hamano, Haruka Ohkawara, Atsushi Ohkawara, Nobushige Kakinoki, Yuji Yamaguchi, Shinji Hirai, Akinori Yanaka, Kiichiro Tsuchiya 
World J Gastroenterol 27(38):6442-6452. Published online Oct 14, 2021. doi: 10.3748/wjg.v27.i38.6442
Retrospective Study
Ni Shi, Guo-Dong Sun, Yuan-Yuan Ji, Ying Wang, Yu-Cheng Zhu, Wan-Qiu Xie, Na-Na Li, Qiu-Yuan Han, Zhi-Dong Qi, Rui Huang, Ming Li, Zhen-Yu Yang, Jun-Bo Zheng, Xing Zhang, Qing-Qing Dai, Gui-Ying Hou, Yan-Song Liu, Hong-Liang Wang, Yang Gao 
World J Gastroenterol 27(38):6453-6464. Published online Oct 14, 2021. doi: 10.3748/wjg.v27.i38.6453
Observational Study
Case Report
Sotaro Ozaka, Kunimitsu Inoue, Tomoya Okajima, Takako Tasaki, Shimpei Ariki, Hideki Ono, Takeaki Ando, Tsutomu Daa, Kazunari Murakami 
World J Gastroenterol 27(38):6501-6510. Published online Oct 14, 2021. doi: 10.3748/wjg.v27.i38.6501
Correction
Letter to the Editor
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