ERBB2 and breast cancer: The DEG36 score effectively stratified the mortality risk of luminal A (n = 679), luminal B (n = 461), HER2+ (HER2-enriched, n = 202), basal-like (n = 199), claudin-low (n = 199), and normal-like (n = 140) BC (Figure 6A); i.e., in the METABRIC cohort (n = 1880), the DEG36 displayed a significant potential in separating BCs with a high fatality risk from those with a low risk.