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Open-Access Journal
Editorial
Gulsum Ozlem Elpek 
World J Gastroenterol 27(45):7739-7747. Published online Dec 7, 2021. doi: 10.3748/wjg.v27.i45.7739
Frontier
Milena Di Leo, Andrea Iannone, Monica Arena, Giuseppe Losurdo, Maria Angela Palamara, Giuseppe Iabichino, Pierluigi Consolo, Maria Rendina, Carmelo Luigiano, Alfredo Di Leo 
World J Gastroenterol 27(45):7748-7770. Published online Dec 7, 2021. doi: 10.3748/wjg.v27.i45.7748
Roberta Angelico, Bruno Sensi, Tommaso M Manzia, Giuseppe Tisone, Giuseppe Grassi, Alessandro Signorello, Martina Milana, Ilaria Lenci, Leonardo Baiocchi 
World J Gastroenterol 27(45):7771-7783. Published online Dec 7, 2021. doi: 10.3748/wjg.v27.i45.7771
Opinion Review
Shunji Fujimori 
World J Gastroenterol 27(45):7784-7791. Published online Dec 7, 2021. doi: 10.3748/wjg.v27.i45.7784
Minireviews
Clinical and Translational Research
Ana Elisa Valencise Quaglio, Felipe Jose Santaella, Maria Aparecida Marchesan Rodrigues, Ligia Yukie Sassaki, Luiz Claudio Di Stasi 
World J Gastroenterol 27(45):7801-7812. Published online Dec 7, 2021. doi: 10.3748/wjg.v27.i45.7801
Observational Study
Shaifali Goel, Abhishek Aggarwal, Assif Iqbal, Vineet Talwar, Swarupa Mitra, Shivendra Singh 
World J Gastroenterol 27(45):7813-7830. Published online Dec 7, 2021. doi: 10.3748/wjg.v27.i45.7813
Wisit Kaewput, Charat Thongprayoon, Carissa Y Dumancas, Swetha R Kanduri, Karthik Kovvuru, Chalermrat Kaewput, Pattharawin Pattharanitima, Tananchai Petnak, Ploypin Lertjitbanjong, Boonphiphop Boonpheng, Karn Wijarnpreecha, Jose L Zabala Genovez, Saraschandra Vallabhajosyula, Caroline C Jadlowiec, Fawad Qureshi, Wisit Cheungpasitporn 
World J Gastroenterol 27(45):7831-7843. Published online Dec 7, 2021. doi: 10.3748/wjg.v27.i45.7831
Case Report
Ying Lin, Yu-Hang Pan, Ming-Kai Li, Xiao-Dan Zong, Xue-Mei Pan, Shu-Yan Tan, Yun-Wei Guo 
World J Gastroenterol 27(45):7844-7854. Published online Dec 7, 2021. doi: 10.3748/wjg.v27.i45.7844
Letter to the Editor
Henu Kumar Verma, LVKS Bhaskar 
World J Gastroenterol 27(45):7855-7858. Published online Dec 7, 2021. doi: 10.3748/wjg.v27.i45.7855
Yue Xi, Peng-Fei Xu 
World J Gastroenterol 27(45):7859-7861. Published online Dec 7, 2021. doi: 10.3748/wjg.v27.i45.7859
Ming Yang, Chun-Ye Zhang 
World J Gastroenterol 27(45):7862-7865. Published online Dec 7, 2021. doi: 10.3748/wjg.v27.i45.7862
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