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Open-Access Journal
Review
Ilaria Trestini, Marco Cintoni, Emanuele Rinninella, Futura Grassi, Salvatore Paiella, Roberto Salvia, Emilio Bria, Carmelo Pozzo, Sergio Alfieri, Antonio Gasbarrini, Giampaolo Tortora, Michele Milella, Maria Cristina Mele 
World J Gastrointest Surg 13(9):885-903. Published online Sep 27, 2021. doi: 10.4240/wjgs.v13.i9.885
Minireviews
Shan-Ping Ye, Wei-Quan Zhu, Zhi-Xiang Huang, Dong-Ning Liu, Xiang-Qiong Wen, Tai-Yuan Li 
World J Gastrointest Surg 13(9):941-952. Published online Sep 27, 2021. doi: 10.4240/wjgs.v13.i9.941
Francesca Carissimi, Matteo Nazzareno Barbaglia, Livia Salmi, Cristina Ciulli, Linda Roccamatisi, Giuseppe Cordaro, Venkata Ramana Mallela, Rosalba Minisini, Biagio Eugenio Leone, Matteo Donadon, Guido Torzilli, Mario Pirisi, Fabrizio Romano, Simone Famularo 
World J Gastrointest Surg 13(9):967-978. Published online Sep 27, 2021. doi: 10.4240/wjgs.v13.i9.967
Retrospective Cohort Study
Hui Wang, Ying-Xin Fu, Wen-Li Song, Chun-Bai Mo, Gang Feng, Jie Zhao, Guang-Hui Pei, Xiao-Feng Shi, Zhen Wang, Yu Cao, Ye-Qi Nian, Zhong-Yang Shen 
World J Gastrointest Surg 13(9):988-999. Published online Sep 27, 2021. doi: 10.4240/wjgs.v13.i9.988
Retrospective Study
Ye Won Jeon, In Ja Park, Jeong Eun Kim, Jin-Hong Park, Seok-Byung Lim, Chan Wook Kim, Yong Sik Yoon, Jong Lyul Lee, Chang Sik Yu, Jin Cheon Kim 
World J Gastrointest Surg 13(9):1000-1011. Published online Sep 27, 2021. doi: 10.4240/wjgs.v13.i9.1000
Observational Study
Francisco Javier Pérez Lara, Rogelio Zubizarreta Jimenez, Francisco Javier Moya Donoso, Jose Manuel Hernández Gonzalez, Tatiana Prieto-Puga Arjona, Ricardo Marín Moya, Maria Pitarch Martinez 
World J Gastrointest Surg 13(9):1039-1049. Published online Sep 27, 2021. doi: 10.4240/wjgs.v13.i9.1039
Prospective Study
Gökçe Aylaz, Cihangir Akyol, Akın Fırat Kocaay, Derya Gökmen, Ayşe Burcu Yavuzarslan, Ayhan Bülent Erkek, Mehmet Ayhan Kuzu 
World J Gastrointest Surg 13(9):1050-1062. Published online Sep 27, 2021. doi: 10.4240/wjgs.v13.i9.1050
Systematic Reviews
Meta-Analysis
Case Report
Eric Bergeron, Thibaut Maniere, Xuan Vien Do, Michael Bensoussan, Eric De Broux 
World J Gastrointest Surg 13(9):1095-1101. Published online Sep 27, 2021. doi: 10.4240/wjgs.v13.i9.1095