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Open-Access Journal
Opinion Review
Christoph G Dietrich, Dolores Hübner, Joachim W Heise 
World J Gastrointest Surg 13(3):222-230. Published online Mar 27, 2021. doi: 10.4240/wjgs.v13.i3.222
Review
Cornelius J Fernandez, Mayuri Agarwal, Biju Pottakkat, Nisha Nigil Haroon, Annu Susan George, Joseph M Pappachan 
World J Gastrointest Surg 13(3):231-255. Published online Mar 27, 2021. doi: 10.4240/wjgs.v13.i3.231
Retrospective Study
Ren-Xiong Chen, Zhou-Qiao Wu, Zi-Yu Li, Hong-Zhi Wang, Jia-Fu Ji 
World J Gastrointest Surg 13(3):256-266. Published online Mar 27, 2021. doi: 10.4240/wjgs.v13.i3.256
Wen-Chang Li, Jing-Kun Zhao, Wen-Qing Feng, Yi-Ming Miao, Zi-Feng Xu, Zhuo-Qing Xu, Han Gao, Jing Sun, Min-Hua Zheng, Ya-Ping Zong, Ai-Guo Lu 
World J Gastrointest Surg 13(3):267-278. Published online Mar 27, 2021. doi: 10.4240/wjgs.v13.i3.267
Li-Peng Zhang, Cheng-Feng Wang, Zong-Ming Zhang, Xiao-Hao Zheng, Yong-Xing Du, Hu Ren 
World J Gastrointest Surg 13(3):279-302. Published online Mar 27, 2021. doi: 10.4240/wjgs.v13.i3.279
Case Report
Michel Ribeiro Fernandes, Caroline Lorenzoni Almeida Ghezzi, Tomaz JM Grezzana-Filho, Flávia Heinz Feier, Ian Leipnitz, Aljamir Duarte Chedid, Carlos Thadeu Schmidt Cerski, Marcio Fernandes Chedid, Cléber Rosito Pinto Kruel 
World J Gastrointest Surg 13(3):315-322. Published online Mar 27, 2021. doi: 10.4240/wjgs.v13.i3.315
Hong-Wei Han, Ning Shi, Yi-Ping Zou, Yuan-Peng Zhang, Ye Lin, Zi Yin, Zhi-Xiang Jian, Hao-Sheng Jin 
World J Gastrointest Surg 13(3):323-329. Published online Mar 27, 2021. doi: 10.4240/wjgs.v13.i3.323
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