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Open-Access Journal
Frontier
Elettra Merola, Andrea Michielan, Umberto Rozzanigo, Marco Erini, Sandro Sferrazza, Stefano Marcucci, Chiara Sartori, Chiara Trentin, Giovanni de Pretis, Franca Chierichetti 
World J Gastrointest Surg 14(2):78-106. Published online Feb 27, 2022. doi: 10.4240/wjgs.v14.i2.78
Retrospective Cohort Study
Suguru Yamauchi, Hajime Orita, Jun Chen, Hiroki Egawa, Yutaro Yoshimoto, Akira Kubota, Ryota Matsui, Yukinori Yube, Sanae Kaji, Shinichi Oka, Malcolm V Brock, Tetsu Fukunaga 
World J Gastrointest Surg 14(2):120-131. Published online Feb 27, 2022. doi: 10.4240/wjgs.v14.i2.120
Retrospective Study
Ke-Xiang Zhu, Ping Yue, Hai-Ping Wang, Wen-Bo Meng, Jian-Kang Liu, Lei Zhang, Xiao-Liang Zhu, Hui Zhang, Long Miao, Zheng-Feng Wang, Wen-Ce Zhou, Azumi Suzuki, Kiyohito Tanaka, Xun Li 
World J Gastrointest Surg 14(2):132-142. Published online Feb 27, 2022. doi: 10.4240/wjgs.v14.i2.132
Systematic Reviews
Diogo Turiani Hourneaux de Moura, Anna Carolina Batista Dantas, Igor Braga Ribeiro, Thomas R McCarty, Flávio Roberto Takeda, Marco Aurelio Santo, Sergio Carlos Nahas, Eduardo Guimarães Hourneaux de Moura 
World J Gastrointest Surg 14(2):185-199. Published online Feb 27, 2022. doi: 10.4240/wjgs.v14.i2.185
Case Report