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Open-Access Journal
Frontier
Antonio Pesce, Gaetano Piccolo, Francesca Lecchi, Nicolò Fabbri, Michele Diana, Carlo Vittorio Feo 
World J Gastroenterol 27(36):5989-6003. Published online Sep 28, 2021. doi: 10.3748/wjg.v27.i36.5989
Review
Xing-Yu Liu, Chuan-Hao Guo, Zhi-Yuan Xi, Xin-Qi Xu, Qing-Yang Zhao, Li-Sha Li, Ying Wang 
World J Gastroenterol 27(36):6004-6024. Published online Sep 28, 2021. doi: 10.3748/wjg.v27.i36.6004
Minireviews
Ivana Mikolasevic, Dorotea Bozic, Tajana Pavić, Alen Ruzic, Goran Hauser, Marija Radic, Delfa Radic-Kristo, Melanija Razov-Radas, Zeljko Puljiz, Sandra Milic 
World J Gastroenterol 27(36):6039-6052. Published online Sep 28, 2021. doi: 10.3748/wjg.v27.i36.6039
Mariangela Stinco, Chiara Rubino, Sandra Trapani, Giuseppe Indolfi 
World J Gastroenterol 27(36):6053-6063. Published online Sep 28, 2021. doi: 10.3748/wjg.v27.i36.6053
Basic Study
Hai-Yan Cui, Jian-Sheng Rong, Ju Chen, Jie Guo, Jia-Qin Zhu, Mei Ruan, Rong-Rong Zuo, Shuang-Shuang Zhang, Jun-Mei Qi, Bao-Hua Zhang 
World J Gastroenterol 27(36):6079-6092. Published online Sep 28, 2021. doi: 10.3748/wjg.v27.i36.6079
Case Control Study
Bilal Rah, Manzoor Ahmad Banday, Gh Rasool Bhat, Omar J Shah, Humira Jeelani, Fizalah Kawoosa, Tahira Yousuf, Dil Afroze 
World J Gastroenterol 27(36):6093-6109. Published online Sep 28, 2021. doi: 10.3748/wjg.v27.i36.6093
Retrospective Study
Valentina Brancato, Nunzia Garbino, Lorenzo Mannelli, Marco Aiello, Marco Salvatore, Monica Franzese, Carlo Cavaliere 
World J Gastroenterol 27(36):6110-6127. Published online Sep 28, 2021. doi: 10.3748/wjg.v27.i36.6110
Observational Study
Damir Alicic, Dinko Martinovic, Doris Rusic, Piero Marin Zivkovic, Ivana Tadin Hadjina, Marino Vilovic, Marko Kumric, Daria Tokic, Daniela Supe-Domic, Slaven Lupi-Ferandin, Josko Bozic 
World J Gastroenterol 27(36):6142-6153. Published online Sep 28, 2021. doi: 10.3748/wjg.v27.i36.6142
Case Report
Ismael El Hajra Martínez, Marta Calvo, José Luis Martínez-Porras, Lucia Gomez-Pimpollo Garcia, Jose L Rodriguez, Carmen Leon, José Luis Calleja Panero 
World J Gastroenterol 27(36):6154-6160. Published online Sep 28, 2021. doi: 10.3748/wjg.v27.i36.6154
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