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Review
Samuel D Johnson, Omalla A Olwenyi, Namita Bhyravbhatla, Michellie Thurman, Kabita Pandey, Elizabeth A Klug, Siddappa N Byrareddy, Kamal Singh, Mahesh Mohan, Courtney V Fletcher, Anthony T Podany, Arpan Acharya, Shetty Ravi Dyavar, Morgan Johnston 
World J Gastroenterol 27(29):4763-4783. Published online Aug 7, 2021. doi: 10.3748/wjg.v27.i29.4763
Minireviews
Joel Joseph, Ella Marie LePage, Catherine Phillips Cheney, Rishi Pawa 
World J Gastroenterol 27(29):4802-4817. Published online Aug 7, 2021. doi: 10.3748/wjg.v27.i29.4802
Basic Study
Retrospective Study
Valentina Guatibonza-García, Paula Valentina Gaete, Agustín Pérez-Londoño, Danna Kathalina Puerto-Baracaldo, Sebastián Antonio Gutiérrez-Romero, Carlos O Mendivil, Monica Tapias 
World J Gastroenterol 27(29):4890-4899. Published online Aug 7, 2021. doi: 10.3748/wjg.v27.i29.4890
Clinical Trials Study
Observational Study
Evelyn Nunes Goulart da Silva Pereira, Daniela Polessa Paula, Beatriz Peres de Araujo, Maria de Jesus Mendes da Fonseca, Maria de Fátima Haueisen Sander Diniz, Anissa Daliry, Rosane Harter Griep 
World J Gastroenterol 27(29):4913-4928. Published online Aug 7, 2021. doi: 10.3748/wjg.v27.i29.4913
Case Report
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