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DNA methylation in DNA repair candidate genes. Methylation levels in the promoter of XRCC1 (A) and OGG1 (B) in peripheral blood samples of Hg exposed gold miners and control group. Genomic location targeted by specific primers in shown in the upper panel for each assay. Mean methylation for the targeted region is shown in the left panel, and methylation levels by CpG site is shown in the right panel. Mann-Witney U test, (**) p < 0.01.
