IL1B and breast cancer: An Asian-Chinese case–control study reported IL1B SNPs rs16944 (− 511G>A) and rs1143623 (C>G) was associated with decreased breast cancer risk [co-dominant model: OR (95% CI) = 0.60 (0.41–0.90), P = 0.034; co-dominant model: OR (95% CI) = 0.65 (0.45–0.94), P = 0.023]6.