Letrozole in Breast Cancer Who Have Received 5 Years of Aromatase Inhibitor Therapy
Status: COMPLETED
Study type: INTERVENTIONAL
Conditions: Breast Cancer
Interventions: DRUG: letrozole|OTHER: placebo
Sponsor: Canadian Cancer Trials Group
Collaborators: Eastern Cooperative Oncology Group|North Central Cancer Treatment Group|SWOG Cancer Research Network|Alliance for Clinical Trials in Oncology