RecruitingPhase 1Drug trialAnlotinib With Trastuzumab Deruxtecan for Previously Treated HER2-Low Advanced Breast CancerThis study will evaluate the safety, tolerability and efficacy of anlotinib and trastuzumab deruxtecan in human epidermal growth factor receptor 2 (HER2)-low unresectable and/or metastatic breast cancer who had received ≤1 line of prior chemotherapy.