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Open-Access Journal
Opinion Review
Review
Minireviews
Basic Study
Xiao-Hua Li, Yong-Yi Huang, Lin-Ming Lu, Li-Juan Zhao, Xian-Ke Luo, Ru-Jia Li, Yuan-Yuan Dai, Chun Qin, Yan-Qiang Huang, Hao Chen 
World J Gastroenterol 27(24):3595-3608. Published online Jun 28, 2021. doi: 10.3748/wjg.v27.i24.3595
Case Control Study
Retrospective Study
Ulrike Bauer, Sabine Gerum, Falk Roeder, Stefan Münch, Stephanie E Combs, Alexander B Philipp, Enrico N De Toni, Martha M Kirstein, Arndt Vogel, Carolin Mogler, Bernhard Haller, Jens Neumann, Rickmer F Braren, Marcus R Makowski, Philipp Paprottka, Markus Guba, Fabian Geisler, Roland M Schmid, Andreas Umgelter, Ursula Ehmer 
World J Gastroenterol 27(24):3630-3642. Published online Jun 28, 2021. doi: 10.3748/wjg.v27.i24.3630
Observational Study
Systematic Reviews