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Open-Access Journal
Review
Vasiliy Ivanovich Reshetnyak, Alexandr Igorevich Burmistrov, Igor Veniaminovich Maev 
World J Gastroenterol 27(7):545-560. Published online Feb 21, 2021. doi: 10.3748/wjg.v27.i7.545
Basic Study
Clinical and Translational Research
Kento Imajo, Louise Tetlow, Andrea Dennis, Elizabeth Shumbayawonda, Sofia Mouchti, Timothy J Kendall, Eve Fryer, Shogi Yamanaka, Yasushi Honda, Takaomi Kessoku, Yuji Ogawa, Masato Yoneda, Satoru Saito, Catherine Kelly, Matt D Kelly, Rajarshi Banerjee, Atsushi Nakajima 
World J Gastroenterol 27(7):609-623. Published online Feb 21, 2021. doi: 10.3748/wjg.v27.i7.609
Retrospective Study
Yu-Chen Huang, Ning-Ning Yang, Hong-Chun Chen, Yuan-Li Huang, Wen-Tian Yan, Ru-Xue Yang, Nan Li, Shan Zhang, Pan-Pan Yang, Zhen-Zhong Feng 
World J Gastroenterol 27(7):624-640. Published online Feb 21, 2021. doi: 10.3748/wjg.v27.i7.624
Clinical Trials Study