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Open-Access Journal
Review
Basic Study
Chong-Bing Sun, Hong-Yi Wang, Xiao-Qing Han, Yong-Ning Liu, Meng-Chun Wang, Hong-Xia Zhang, You-Feng Gu, Xiao-Gang Leng 
World J Gastrointest Oncol 12(4):394-404. Published online Apr 15, 2020. doi: 10.4251/wjgo.v12.i4.394
Retrospective Cohort Study
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
Observational Study
Prospective Study
Evidence-Based Medicine