https://www.cancer.gov/research/participate/clinical-trials-search/v?id=NCT02311933&r=1
Tamoxifen Citrate or Z-Endoxifen Hydrochloride in Treating Patients with Locally Advanced or Metastatic, Estrogen Receptor-Positive, HER2-Negative Breast Cancer
tamoxifen citratezendoxifenhydrochloridetreating