In a prespecified exploratory analysis of the CD16A-158 polymorphism (V, high-affinity; F, low-affinity), patients with the CD16A-158FF genotype showed a trend toward improved OS with margetuximab compared with trastuzumab (median, 23.6 vs. 19.2 months; HR, 0.72; 95% CI, 0.52–1.00).
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Overcoming Trastuzumab-Pertuzumab Resistance and Optimizing Sequential Anti-HER2 Therapy in HER2-Positive Metastatic Breast Cancer.
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