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Open-Access Journal
Review
Basic Study
Mitsuru Esaki, Toshiki Horii, Ryoji Ichijima, Masafumi Wada, Seiichiro Sakisaka, Shuichi Abe, Naru Tomoeda, Yusuke Kitagawa, Kei Nishioka, Yosuke Minoda, Shinichi Tsuruta, Sho Suzuki, Hirotada Akiho, Eikichi Ihara, Yoshihiro Ogawa, Takuji Gotoda 
World J Gastrointest Surg 13(2):116-126. Published online Feb 27, 2021. doi: 10.4240/wjgs.v13.i2.116
Retrospective Study
Bing-Jie Ju, Ming Jin, Yang Tian, Xiang Zhen, De-Xing Kong, Wei-Lin Wang, Sheng Yan 
World J Gastrointest Surg 13(2):127-140. Published online Feb 27, 2021. doi: 10.4240/wjgs.v13.i2.127
Somashekar G Krishna, Brandon K Chu, Alecia M Blaszczak, Gokulakrishnan Balasubramanian, Hisham Hussan, Peter P Stanich, Khalid Mumtaz, Alice Hinton, Darwin L Conwell 
World J Gastrointest Surg 13(2):141-152. Published online Feb 27, 2021. doi: 10.4240/wjgs.v13.i2.141
Yosuke Tsuruga, Toshiya Kamiyama, Hirofumi Kamachi, Tatsuya Orimo, Shingo Shimada, Akihisa Nagatsu, Yoh Asahi, Yuzuru Sakamoto, Tatsuhiko Kakisaka, Akinobu Taketomi 
World J Gastrointest Surg 13(2):153-163. Published online Feb 27, 2021. doi: 10.4240/wjgs.v13.i2.153
Retrospective Cohort Study
Matteo Mueller, Marcel André Schneider, Barla Deplazes, Daniela Cabalzar-Wondberg, Andreas Rickenbacher, Matthias Turina 
World J Gastrointest Surg 13(2):164-175. Published online Feb 27, 2021. doi: 10.4240/wjgs.v13.i2.164
Observational Study
Tai Ren, Yong-Sheng Li, Xue-Yi Dang, Yang Li, Zi-Yu Shao, Run-Fa Bao, Yi-Jun Shu, Xu-An Wang, Wen-Guang Wu, Xiang-Song Wu, Mao-Lan Li, Hong Cao, Kun-Hua Wang, Hong-Yu Cai, Chong Jin, Hui-Han Jin, Bo Yang, Xiao-Qing Jiang, Jian-Feng Gu, Yun-Fu Cui, Zai-Yang Zhang, Chun-Fu Zhu, Bei Sun, Chao-Liu Dai, Lin-Hui Zheng, Jing-Yu Cao, Zhe-Wei Fei, Chang-Jun Liu, Bing Li, Jun Liu, Ye-Ben Qian, Yi Wang, Ya-Wei Hua, Xi Zhang, Chang Liu, Wan-Yee Lau, Ying-Bin Liu 
World J Gastrointest Surg 13(2):176-186. Published online Feb 27, 2021. doi: 10.4240/wjgs.v13.i2.176
Prospective Study
Roxanne Villiger, Daniela Cabalzar-Wondberg, Daniela Zeller, Pascal Frei, Luc Biedermann, Christian Schneider, Michael Scharl, Gerhard Rogler, Matthias Turina, Andreas Rickenbacher, Benjamin Misselwitz 
World J Gastrointest Surg 13(2):187-197. Published online Feb 27, 2021. doi: 10.4240/wjgs.v13.i2.187
Systematic Reviews
Scientometrics
Zhen Zong, Ce-Gui Hu, Tai-Cheng Zhou, Zhuo-Min Yu, Fu-Xin Tang, Hua-Kai Tian, Hui Li, He Wang 
World J Gastrointest Surg 13(2):210-221. Published online Feb 27, 2021. doi: 10.4240/wjgs.v13.i2.210
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