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(A) RFS, (B) OS, and (C) BCSS by pCR (left) versus PDX engraftment (right) in the overall population. BCSS, breast cancer-specific survival; OS, overall survival; pCR, pathologic complete response; PDX, patient-derived xenograft; PDX+, successful engraftment; PDX–, no engraftment; RD, residual disease; RFS, relapse-free survival.
