NCT00290745 2020-12-04Tamoxifen or Letrozole in Treating Women With Ductal Carcinoma in SituUniversity of California, San FranciscoPhase 1/2 Completed79 enrolled 15 charts
NCT03238703 2018-12-27Endocrine Therapy in Treating Patients With HER2 Negative, Low Risk Breast CancerFred Hutchinson Cancer CenterPhase 4 Withdrawn