Frontiers in Pharmacology, Vol 12 (2021) Frontiers in pharmacology 12, 671640 (2021). doi:10.3389/fphar.2021.671640 special issue: "Inflammation and Fibrosis in the Gastrointestinal Tract and Liver: Mechanisms and Targets / Edited by Ralf Weiskirchen, Dario Sorrentino, Wolfgang R. Stremmel" Frontiers in Pharmacology