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Open-Access Journal
Therapeutic and Diagnostic Guidelines
Review
Ivana Milosevic, Edda Russo, Ankica Vujovic, Aleksandra Barac, Olja Stevanovic, Stefano Gitto, Amedeo Amedei 
World J Gastroenterol 27(33):5488-5501. Published online Sep 7, 2021. doi: 10.3748/wjg.v27.i33.5488
Alejandro Campos-Murguía, Berenice M Román-Calleja, José A González-Regueiro, Ivonne Hurtado-Díaz-de-León, Alberto Adrián Solís-Ortega, Nayelli C Flores-García, Ignacio García-Juárez, Astrid Ruiz-Margáin, Ricardo Ulises Macías-Rodríguez 
World J Gastroenterol 27(33):5502-5519. Published online Sep 7, 2021. doi: 10.3748/wjg.v27.i33.5502
Minireviews
Chiara Viganò, Giacomo Mulinacci, Andrea Palermo, Donatella Barisani, Lorena Pirola, Maria Fichera, Pietro Invernizzi, Sara Massironi 
World J Gastroenterol 27(33):5520-5535. Published online Sep 7, 2021. doi: 10.3748/wjg.v27.i33.5520
Basic Study
Brian White, John D Sterrett, Zoya Grigoryan, Lauren Lally, Jared D Heinze, Hyder Alikhan, Christopher A Lowry, Lark J Perez, Joshua DeSipio, Sangita Phadtare 
World J Gastroenterol 27(33):5575-5594. Published online Sep 7, 2021. doi: 10.3748/wjg.v27.i33.5575
Retrospective Study
Letter to the Editor
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