FOS and neoplasm: Strikingly, the transcription factors AP‐1, SRF, and TEAD4 have all been linked to epithelial‐to‐mesenchymal transition (EMT)28, 29, 30 and heat shock factor 1 (HSF1), enriched in both Luminal A and Basal‐like tumours, has been associated with many aspects of malignancy.31