Molecular and clinical insights of trastuzumab deruxtecan efficacy in advanced breast cancer. - Nassar AH; Bou Farhat E; Abushukair H; Alchoueriy M; Salem S; Machaalani M; Adib E; Henske EP; Babu P; Choueiri TK; Rakaee M; Busund LR; et al. (Journal of the National Cancer Institute, 2026)