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Open-Access Journal
Basic Study
Case Control Study
Retrospective Cohort Study
Anne Katrin Berger, Michael Allgäuer, Leonidas Apostolidis, Anna Elisa Schulze-Schleithoff, Uta Merle, Dirk Jaeger, Georg Martin Haag 
World J Gastrointest Oncol 12(11):1288-1295. Published online Nov 15, 2020. doi: 10.4251/wjgo.v12.i11.1288
Retrospective Study
Hiroaki Ito, Naoyuki Uragami, Tomokazu Miyazaki, William Yang, Kenji Issha, Kai Matsuo, Satoshi Kimura, Yuji Arai, Hiromasa Tokunaga, Saiko Okada, Machiko Kawamura, Noboru Yokoyama, Miki Kushima, Haruhiro Inoue, Takashi Fukagai, Yumi Kamijo 
World J Gastrointest Oncol 12(11):1311-1324. Published online Nov 15, 2020. doi: 10.4251/wjgo.v12.i11.1311
Randomized Controlled Trial
Meta-Analysis
Case Report
Ayako Doi, Hiroyuki Takeda, Kumiko Umemoto, Ryosuke Oumi, Shinji Wada, Shingo Hamaguchi, Hidefumi Mimura, Hiroyuki Arai, Yoshiki Horie, Takuro Mizukami, Naoki Izawa, Takashi Ogura, Takako Eguchi Nakajima, Yu Sunakawa 
World J Gastrointest Oncol 12(11):1364-1371. Published online Nov 15, 2020. doi: 10.4251/wjgo.v12.i11.1364