IL21R and breast cancer: The SNPs with the minor allele associated with an increased risk of BC were: PRF1-rs10999426, IL7R-rs1494555, ABCA1-rs2230806, IFNAR2-rs2236757, MASP1-rs710459, BLNK-rs12357751, MAP3K3-rs7209435, BLNK-rs10882755, TLR2-rs3804099, SOCS6-rs723279, IL17C-rs899729, TLR4-rs2737191, FOS-rs1063169, ABCC4-rs3765535, PARP4-rs13428, BIRC3-rs11602147, IL21R-rs8049804, FADD-rs7939734 and ICAM1-rs5498.