Procedures
TNBCs, Tumor, Cancer
DISEASE PROGRESSION, TUMOR, CANCER
Patients who had heavily pretreated metastatic TNBCs and experienced disease progression during or following almost all standard chemotherapies (anthracycline, taxane, platinum, vinorelbine, capecitabine, and gemcitabine) were screened in four centers, including FUSCC, Beijing Cancer Hospital, Liaoning Cancer Hospital and Institute and the First Hospital of Jilin University. Tumor biopsies were obtained to allow IHC staining (AR, CD8 and FOXC1) and NGS (Supplementary information, Table 