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Kaplan–Meier curves of PFS in patients (A) with and (B) without BMs.
BMs, brain metastases; CI, confidence interval; HR, hazard ratio; mPFS, median progression-free survival; NE, not estimable; NR, not reached; PFS, progression-free survival; T-DM1, trastuzumab emtansine; T-DXd, trastuzumab deruxtecan.
