ERBB2 and neoplasm: In the HER2 +++ model, tumor growth was inhibited by 103%, 99%, and 111% by T‐DM1, LCB‐ADC1, and LCB‐ADC2, respectively, and two out of five mice were tumor‐free in the LCB‐ADC2‐treated group at day 38 (Figure 6a).