OGG1 and cancer: In subgroup analyses by ethnicities, we found that the hOGG1 Ser326Cys polymorphism was associated with overall cancer risk in Asian population (Cys/Cys vs. Ser/Ser: OR = 1.21, 95%CI = 1.10–1.33, P<0.001; Cys/Cys vs. Cys/Ser+Ser/Ser: OR = 1.14, 95%CI = 1.03–1.26, P = 0.004; Cys/Cys+Cys/Ser vs. Ser/Ser: OR = 1.12, 95%CI = 1.05–1.19, P<0.001; Table S2).