NCT07582887 2026-05-13Impact of Genetic Variants on the Toxicity of Antibody-Drug Conjugates in Locally Advanced or Metastatic Breast Cancer: The Role of the UGT1A1 Gene as a Predictive Biomarker of Therapeutic ResponseFundación Pública Andaluza para la Investigación Biomédica Andalucía OrientalRecruiting70 enrolled