FOXA1 and breast cancer: WGCNA partitioned ~20% of expressed genes into eight consensus modules that align with established hallmarks of breast cancer; for example, an ER/FOXA1-driven module expressed in luminal tumours, and a mitotic instability module in basal-like and luminal-B tumours (Table 1, Fig. 3a, Tables S5–S8 and Supp File 2).