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Open-Access Journal
Editorial
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
Minireviews
Clinical and Translational Research
Observational Study
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
Letter to the Editor