A randomized phase II study of aromatase inhibitors plus metformin in pre-treated postmenopausal patients with hormone receptor positive metastatic breast cancer.

Oncotarget · 2017 · PMC5663590 · PMID 29137418

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showed a trendno p-value reported

Patients with primary resistance and progressing on last antiestrogen therapy showed a trend of prolonged PFS.

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