Among all the pts, the DCR was 88.5% (46/52); for pts with HER2+ BC and HER2-low BC, the DCRs were 96.2% (25/26) and 84.6% (11/13), respectively....DB-1303 was well tolerated with encouraging preliminary antitumor activity in heavily pretreated pts with advanced/metastatic solid tumors, especially in pts with HER2+ BC and brain metastasis as well as in HER2-low BC….