Lee and collaborators [123] recruited 3035 cases matched with 3037 population controls sampling from the “Shanghai Breast Cancer Study” A GSTP1 haplotype (namely, the Val/Val genotype) significantly correlated with a higher risk of developing breast tumor (displaying an OR of 1.50 (95% CI 1.12–1.99)). This evidence concerns the gene GSTP1 and breast cancer.