MUS81 and breast neoplasm: Using ER+ breast tumor RNA sequencing (RNA-seq) and genotyping data from the BRCA dataset of TCGA, we identified several significant eQTL genes in cis for rs3903072, including CTSW, FIBP, MUS81, and EIF1AD (genotype p-values of a linear model adjusting for gene copy number: p= 3.52 × 10–5, p = 3.22 × 10–5, p = 1.24 × 10–4, p = 3.28 × 10–3, respectively (Figure 1B); a complete list of eQTL genes in Supplementary Table 3), confirming the results previously reported (Michailidou et al., 2013).