Studying Tumor Samples From Women Who Have Undergone Chemotherapy for Breast Cancer
Status: COMPLETED
Study type: OBSERVATIONAL
Conditions: Breast Cancer
Interventions: GENETIC: RNA analysis|GENETIC: microarray analysis|OTHER: immunohistochemistry staining method|OTHER: laboratory biomarker analysis
Sponsor: ECOG-ACRIN Cancer Research Group
Collaborators: National Cancer Institute (NCI)