ANGPTL4 and gastritis: First, within the gastric mucosa of patients infected with H. pylori, positive correlations between ANGPTL4 and CCL5 as well as between CCL5 and Foxp3 were found (Fig. 6C and Fig. S15B), and CCL5 was also increased and was found to be positively correlated with the severity of gastritis (Fig. S15C to F).