ZNF703 and breast cancer: Because adipocytes are the predominant stromal cell type in mammary tissue, we also performed follow-up analyses using the S-PrediXcan subcutaneous fat model and discovered a highly significant (p value=2.1 × 10−20) association of ZNF703 with increased breast cancer risk in the four-fold larger BCAC/DRIVE dataset, consistent with the MiXcan stromal cell results in the DRIVE data only.