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Forest plot of hazard ratios (HR) for survival according to primary tumor, liver metastases, and intrinsic subtypes. (A) Overall and (B) progression-free survival after liver metastasectomy. *Luminal A subtype acts as the referent group. CI = confidence interval; ER = estrogen receptor; PR = progesterone receptor; HER2 = human epidermal growth factor receptor 2.
