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Recurrence-free survival (RFS) and overall survival (OS) Kaplan-Meier curves. RFS for HER2-zero vs. HER2-low tumors in the (A) entire HER2-negative population, (B) HR-positive, and (C) HR-negative subgroups, and OS for HER2-zero vs. HER2-low tumors in the (D) entire cohort, (E) HR-positive, and (F) HR-negative population.
