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Kaplan–Meier estimates of invasive disease‐free survival curves for patients with an RS (Surexam® 21‐gene) of 0‐25 (low risk) and patients with an RS (Surexam® 21‐gene) of 26‐100 (high risk). a all patients; b patients older than 50 years of age; c patients 50 years of age or younger.
Abbreviations: RS recurrence score
