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Open-Access Journal
Review
Tsinrong Lee, Thomas Zheng Jie Teng, Vishal G Shelat 
World J Gastrointest Endosc 13(12):571-592. Published online Dec 16, 2021. doi: 10.4253/wjge.v13.i12.571
Minireviews
Zhi-Yan Fu, Michel Kmeid, Mahmoud Aldyab, Stephen M Lagana, Hwajeong Lee 
World J Gastrointest Endosc 13(12):593-606. Published online Dec 16, 2021. doi: 10.4253/wjge.v13.i12.593
Petko Ivanov Karagyozov, Ivan Tishkov, Irina Boeva, Kiril Draganov 
World J Gastrointest Endosc 13(12):607-618. Published online Dec 16, 2021. doi: 10.4253/wjge.v13.i12.607
Sang Hoon Kim, Jae Hak Kim 
World J Gastrointest Endosc 13(12):619-627. Published online Dec 16, 2021. doi: 10.4253/wjge.v13.i12.619
Ângelo Zambam de Mattos, Carlos Terra, Alberto Queiroz Farias, Paulo Lisboa Bittencourt, Alliance of Brazilian Centers for Cirrhosis Care–the ABC Group 
World J Gastrointest Endosc 13(12):628-637. Published online Dec 16, 2021. doi: 10.4253/wjge.v13.i12.628
Eric Markarian, Brian M Fung, Mohit Girotra, James H Tabibian 
World J Gastrointest Endosc 13(12):638-648. Published online Dec 16, 2021. doi: 10.4253/wjge.v13.i12.638
Retrospective Study
Harshavardhan Rao B, Priya Nair, S Krishna Priya, Archana George Vallonthaiel, Dipu T Sathyapalan, Anoop K Koshy, Rama P Venu 
World J Gastrointest Endosc 13(12):649-658. Published online Dec 16, 2021. doi: 10.4253/wjge.v13.i12.649
Observational Study
Vincenzo Occhipinti, Paola Soriani, Francesco Bagolini, Valentina Milani, Emanuele Rondonotti, Maria Laura Annunziata, Flaminia Cavallaro, Sara Vavassori, Maurizio Vecchi, Luca Pastorelli, Gian Eugenio Tontini 
World J Gastrointest Endosc 13(12):659-672. Published online Dec 16, 2021. doi: 10.4253/wjge.v13.i12.659
Systematic Reviews
Harpreet Kaur Sekhon Inderjit Singh, Emily Rose Armstrong, Sujay Shah, Reza Mirnezami 
World J Gastrointest Endosc 13(12):673-697. Published online Dec 16, 2021. doi: 10.4253/wjge.v13.i12.673
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