EHF and breast cancer: In contrast, the role of ELF5 has been studied in breast cancer, where it drives lung metastasis by recruiting myeloid‐derived suppressor cells.15 ELF5 is also necessary for proper lung branching and epithelial differentiation in the mouse.16 It has not been well studied in the human lung, although it is a candidate gene for conferring susceptibility to asthma.17 Furthermore, ELF5 was predicted to regulate EHF expression, since ChIP‐seq with an antibody specific for ELF5 showed its occupancy at the EHF promoter and first intron in the breast cancer cell line T47D.18