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Open-Access Journal
Frontier
Palittiya Sintusek, Kessarin Thanapirom, Piyawat Komolmit, Yong Poovorawan 
World J Gastroenterol 28(3):290-309. Published online Jan 21, 2022. doi: 10.3748/wjg.v28.i3.290
Review
Lampros Chrysavgis, Ilias Giannakodimos, Panagiota Diamantopoulou, Evangelos Cholongitas 
World J Gastroenterol 28(3):310-331. Published online Jan 21, 2022. doi: 10.3748/wjg.v28.i3.310
Minireviews
Basic Study
Josieli R Colares, Renata M Hartmann, Elizângela G Schemitt, Sandielly R B Fonseca, Marilda S Brasil, Jaqueline N Picada, Alexandre S Dias, Aline F Bueno, Cláudio A Marroni, Norma P Marroni 
World J Gastroenterol 28(3):348-364. Published online Jan 21, 2022. doi: 10.3748/wjg.v28.i3.348
Case Control Study
Retrospective Cohort Study
Giuseppe Brisinda, Maria Michela Chiarello, Anna Crocco, Neill James Adams, Pietro Fransvea, Serafino Vanella 
World J Gastroenterol 28(3):381-398. Published online Jan 21, 2022. doi: 10.3748/wjg.v28.i3.381
Letter to the Editor
Tommaso Maria Manzia, Alessandro Parente, Roberta Angelico 
World J Gastroenterol 28(3):399-401. Published online Jan 21, 2022. doi: 10.3748/wjg.v28.i3.399
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