Current medical research and opinion
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To quantify the comparative efficacy of currently available endocrine-based therapies (ETs) for postmenopausal women with hormone receptor positive, human epidermal growth factor receptor-2 negative (HR+/HER2-) metastatic breast cancer (mBC) after non-steroidal aromatase inhibitor (NSAI) progression. ⋯ Postmenopausal women with HR+/HER2- mBC who had previously failed an NSAI and received palbociclib + fulvestrant, everolimus + AI or everolimus + fulvestrant had longer PFS compared to those who received fulvestrant or AI alone.