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Prediction of ELT benefit by MP based on DR. K-M analysis of risk of DR comparing extended letrozole versus placebo in patients with (A) MP low-risk (n = 1,160) tumors and patients with (B) MP high-risk (n = 706) tumors. DR, distant recurrence; ELT, extended letrozole therapy; HR, hazard ratio; K-M, Kaplan-Meier; MP, MammaPrint.
