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Open-Access Journal
Review
Tsinrong Lee, Thomas Zheng Jie Teng, Vishal G Shelat 
World J Gastrointest Surg 12(12):468-490. Published online Dec 27, 2020. doi: 10.4240/wjgs.v12.i12.468
Retrospective Study
Tomoaki Kitahara, Yu Sato, Takashi Oshiro, Rie Matsunaga, Makoto Nagashima, Shinichi Okazumi 
World J Gastrointest Surg 12(12):507-519. Published online Dec 27, 2020. doi: 10.4240/wjgs.v12.i12.507
Clinical Trials Study
Volkan Ince, Brian I Carr, Harika Gozukara Bag, Veysel Ersan, Sertac Usta, Cemalettin Koc, Fatih Gonultas, Baris Kemal Sarici, Serdar Karakas, Koray Kutluturk, Adil Baskiran, Sezai Yilmaz 
World J Gastrointest Surg 12(12):520-533. Published online Dec 27, 2020. doi: 10.4240/wjgs.v12.i12.520
Systematic Reviews
Sami Akbulut, Khaled Demyati, Felat Ciftci, Cemalettin Koc, Adem Tuncer, Emrah Sahin, Nese Karadag, Sezai Yilmaz 
World J Gastrointest Surg 12(12):534-548. Published online Dec 27, 2020. doi: 10.4240/wjgs.v12.i12.534
Case Report
Jia-Wei Zhang, Cheng Peng, Yan-Shuo Ye, Wei Li 
World J Gastrointest Surg 12(12):549-554. Published online Dec 27, 2020. doi: 10.4240/wjgs.v12.i12.549
Yu Zhang, Zhen-Xing Zhang, Zeng-Xin Lu, Fang Liu, Geng-Yuan Hu, Feng Tao, Min-Feng Ye 
World J Gastrointest Surg 12(12):555-563. Published online Dec 27, 2020. doi: 10.4240/wjgs.v12.i12.555
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