Tamoxifen Citrate or Z-Endoxifen Hydrochloride in Treating Patients With Locally Advanced or Metastatic, Estrogen Receptor-Positive, HER2-Negative Breast Cancer
National Cancer Institute (NCI)
National Cancer Institute (NCI)
Dana-Farber Cancer Institute
Eli Lilly and Company
University of Chicago
Dana-Farber Cancer Institute
University of Miami
University of Kentucky
OHSU Knight Cancer Institute
University of Alabama at Birmingham
University of Virginia
European Institute of Oncology
Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University
Dana-Farber Cancer Institute
MedSIR
Seoul National University Hospital
British Columbia Cancer Agency
Karolinska University Hospital
Karolinska University Hospital