Letrozole in Treating Postmenopausal Women Who Have Received Hormone Therapy for Hormone Receptor-Positive Breast Cancer
NSABP Foundation Inc
NSABP Foundation Inc
Alliance for Clinical Trials in Oncology
Jerome Canady Research Institute for Advanced Biological & Technological Sciences
Baylor Breast Care Center
Massachusetts General Hospital
Alexandria University
Northwestern University
NSABP Foundation Inc
Alliance for Clinical Trials in Oncology
M.D. Anderson Cancer Center
ChineseAMS
Genentech, Inc.