XPC and chronic myelogenous leukemia, BCR-ABL1 positive: The association of variant homozygous genotypes of XPC 939 Gln/Gln and XPG 1104 His/His polymorphisms led to significant interaction with the risk of leukemia, especially in the case of CML (OR = 22.52; 95% CI = 5.38–94.25 [27].