[This corrects the article DOI: 10.3389/fnut.2021.718356.].
Keywords: IBD; IBS; celiac disease; gut microbiota; intestinal epithelial barrier; mucosal immune system; non-celiac gluten sensitivity.
Copyright © 2021 Barbara, Barbaro, Fuschi, Palombo, Falangone, Cremon, Marasco and Stanghellini.