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Comparison of mRNA expression levels of the APE1, ATM, ATR, and H2AX genes according to the risk factors gender, age, H. pylori status, and histological tumor type, in the gastric cancer group. The dashed line represents the RQ value of a pool of normal gastric mucosa samples used as calibrator (RQ = 1.0). Hp+ (H. pylori positive); Hp- (H. pylori negative); DGC (diffuse-type gastric cancer); IGC (intestinal-type gastric cancer).
