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Open-Access Journal
Review
Kai Zhang, Ning Liu, Lan-Qing Cao, Wei Li, Jian-Nan Li 
World J Gastrointest Oncol 12(4):365-382. Published online Apr 15, 2020. doi: 10.4251/wjgo.v12.i4.365
Basic Study
Xiao-Gang Leng, You-Feng Gu, Hong-Xia Zhang, Meng-Chun Wang, Yong-Ning Liu, Xiao-Qing Han, Hong-Yi Wang, Chong-Bing Sun 
World J Gastrointest Oncol 12(4):394-404. Published online Apr 15, 2020. doi: 10.4251/wjgo.v12.i4.394
Retrospective Cohort Study
Himani Aggarwal, Kristin M Sheffield, Li Li, David Lenis, Rachael Sorg, Afsaneh Barzi, Rebecca Miksad 
World J Gastrointest Oncol 12(4):405-423. Published online Apr 15, 2020. doi: 10.4251/wjgo.v12.i4.405
Shan-Ping Ye, Wei-Quan Zhu, Dong-Ning Liu, Xiong Lei, Qun-Guang Jiang, Hui-Min Hu, Bo Tang, Peng-Hui He, Geng-Mei Gao, He-Chun Tang, Jun Shi, Tai-Yuan Li 
World J Gastrointest Oncol 12(4):424-434. Published online Apr 15, 2020. doi: 10.4251/wjgo.v12.i4.424
Retrospective Study
Zhi-Yong Jiang, Shinichi Kinami, Naohiko Nakamura, Takashi Miyata, Hideto Fujita, Hiroyuki Takamura, Nobuhiko Ueda, Takeo Kosaka 
World J Gastrointest Oncol 12(4):435-446. Published online Apr 15, 2020. doi: 10.4251/wjgo.v12.i4.435
Cheng-Gang Li, Zhi-Peng Zhou, Xiang-Long Tan, Zhi-Ming Zhao 
World J Gastrointest Oncol 12(4):457-466. Published online Apr 15, 2020. doi: 10.4251/wjgo.v12.i4.457
Observational Study
Prospective Study
Ping Li, Jia-Xun Cai, Fei Han, Jie Wang, Jia-Jie Zhou, Kai-Wen Shen, Liu-Hua Wang 
World J Gastrointest Oncol 12(4):492-502. Published online Apr 15, 2020. doi: 10.4251/wjgo.v12.i4.492
Evidence-Based Medicine
Giulia Manzini, Fabius Hapke, Ian N Hines, Doris Henne-Bruns, Michael Kremer 
World J Gastrointest Oncol 12(4):503-513. Published online Apr 15, 2020. doi: 10.4251/wjgo.v12.i4.503
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