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Open-Access Journal
Minireviews
Basic Study
Retrospective Cohort Study
Retrospective Study
Jin Meng, Zhi-Tao Yin, Ying-Yi Zhang, Yong Zhang, Xiu Zhao, Qing Zhai, De-Yu Chen, Wei-Gang Yu, Lei Wang, Zhi-Gang Wang 
World J Gastrointest Surg 13(5):443-451. Published online May 27, 2021. doi: 10.4240/wjgs.v13.i5.443
Observational Study
Koji Nakada, Yoshiyuki Kawashima, Shinichi Kinami, Ryoji Fukushima, Hiroshi Yabusaki, Akiyoshi Seshimo, Naoki Hiki, Keisuke Koeda, Mikihiro Kano, Yoshikazu Uenosono, Atsushi Oshio, Yasuhiro Kodera 
World J Gastrointest Surg 13(5):461-475. Published online May 27, 2021. doi: 10.4240/wjgs.v13.i5.461
Meta-Analysis
Maria Vitória Cury Vieira Scatimburgo, Igor Braga Ribeiro, Diogo Turiani Hourneaux de Moura, Vitor Massaro Takamatsu Sagae, Bruno Salomão Hirsch, Mateus Bond Boghossian, Thomas R McCarty, Marcos Eduardo Lera dos Santos, Tomazo Antonio Prince Franzini, Wanderley Marques Bernardo, Eduardo Guimarães Hourneaux de Moura 
World J Gastrointest Surg 13(5):493-506. Published online May 27, 2021. doi: 10.4240/wjgs.v13.i5.493
Case Report