OGG1 and female reproductive organ cancer: Substantial heterogeneities were observed among all studies for the association between the hOGG1 Ser326Cys polymorphism and gynecologic cancer susceptibility (homozygous model: P<0.001; heterozygous model: P=0.004; recessive model: P<0.001, and the allele model: P<0.001, Figure 3), except for the dominant model (P=0.130).