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Kaplan–Meier curves of breast cancer-specific survival between breast-conserving surgery and mastectomy according to 21-gene RS groups before (A, low-risk; B, intermediate-risk; C, high-risk) and after (D, low-risk; E, intermediate-risk; F, high-risk) propensity score matching.
Abbreviations: MAST, mastectomy; BCS, breast-conserving surgery; RS, recurrence score.
