In contrast, the HMGCR‐related gene signature stratified breast cancer patients according to overall survival (Fig. 7B, P = 0.0072, n = 508 patients) or disease recurrence in chemotherapy‐insensitive patients (Fig. 7C, left panel; P = 0.0105, n = 339 patients). The gene discussed is HMGCR; the disease is breast cancer.