RANDOMIZED, MULTICENTER, OPEN-LABEL, PHASE III TRIAL COMPARING TRASTUZUMAB PLUS PERTUZUMAB PLUS A TAXANE FOLLOWING ANTHRACYCLINES VERSUS TRASTUZUMAB EMTANSINE PLUS PERTUZUMAB FOLLOWING ANTHRACYCLINES AS ADJUVANT THERAPY IN PATIENTS WITH OPERABLE HER2-POSITIVE PRIMARY BREAST CANCER