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Box and Whisker plots, plotted using the Tukey method, showing the median fasting serum gastrin concentrations in patients within each group (A) PPI treated groups (B) Active H. pylori with gastritis but no evidence of gastric preneoplasia (atrophy/IM) groups (C) Gastric preneoplasia (atrophy/IM) groups. ****p < 0.0001, **p < 0.01, *p < 0.05 compared against the normal group (Mann-Whitney U test).
