DoR and PFS were also not clearly associated with central HER2 status, although a possible trend was observed for longer DoR and PFS in HER2 IHC 1+ versus 0 absent membrane staining and ultralow groups.
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First-line durvalumab in combination with trastuzumab deruxtecan in women with locally advanced unresectable or metastatic, hormone-receptor-negative, HER2-low breast cancer: multicenter, open-label, phase 1b/2 BEGONIA platform trial.
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