Tamoxifen Citrate, Letrozole, Anastrozole, or Exemestane With or Without Chemotherapy in Treating Patients With Invasive RxPONDER Breast Cancer
National Cancer Institute (NCI)
National Cancer Institute (NCI)
M.D. Anderson Cancer Center
Radiation Therapy Oncology Group
Institut du Cancer de Montpellier - Val d'Aurelle
University of Washington
City of Hope Medical Center
Alliance Foundation Trials, LLC.
The Netherlands Cancer Institute
UNICANCER
M.D. Anderson Cancer Center
Dana-Farber Cancer Institute
Ohio State University Comprehensive Cancer Center