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PSM-adjusted OS and BCSS of patients with dnMBC. Kaplan-Meier (K-M) survival analysis: A. OS of patients with dnMBC; B. BCSS of patients with dnMBC; PSM: Propensity score matching; BH: Multiple comparisons were corrected by the Benjamini & Hochberg method; NS: neoadjuvant systemic therapy followed with surgery; SC: surgery followed with chemotherapy; CW: chemotherapy without surgery; dnMBC: de novo metastatic breast cancer.
