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Comparison of serum gastric biomarker levels by Helicobacter pylori infection status. Compared to non-infected subjects, serum levels of PGI, PGII and G-17 were significantly higher, while the ratio of PGI/PGII was significantly lower in Helicobacter pylori-infected subjects. aP < 0.05, bP < 0.01. G-17: Gastrin-17; PGI: Pepsinogen I; PGII: Pepsinogen II.
