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Abbreviations: AI, aromatase inhibitor; AZ, anastrozole; CB, clinical benefit; CR, complete response; ET, endocrine therapy; EXE, exemestane; Gos, goserelin; LHRH, luteinizing hormone‐releasing hormone; LZ, letrozole, NR, not reported; ORR, overall response rate; PR, partial remission; SD, stable disease; TAM, tamoxifen; TTP, time to progression.
