deaths (OS)

la/mBC - HER2 positive - 1st Line (L1) breast cancer - HER2-positive la/mBC - HER2 positive la/mBC - HER2 positive - 1st Line (L1)

la/mBC - HER2 positive - 2nd Line (L2) breast cancer - HER2-positive la/mBC - HER2 positive la/mBC - HER2 positive - 2nd Line (L2)

versus trastuzumab plus chemotherapy
margetuximab plus chemotherapy vs. trastuzumab plus chemotherapy 1 -223 [-1070; 623] /10000
131/266 vs. 139/270