ERBB2 and neoplasm: Basal-like tumours and HER2 tumours shared a similar poor disease-free survival outcome (Supplementary Figure 2) and were associated with a significantly shorter disease-free survival compared with luminal tumours (P<0.001, OR 2.58, 95% CI 1.82–3.65) (Negative tumours were excluded from the analysis because of the small sample size but are included the figure).