Studying Blood and DNA Samples From Patients With Breast Cancer Treated With Chemotherapy With or Without Trastuzumab
Status: COMPLETED
Study type: OBSERVATIONAL
Conditions: Breast Cancer
Interventions: GENETIC: DNA analysis|GENETIC: gene expression analysis|GENETIC: polymerase chain reaction|OTHER: enzyme-linked immunosorbent assay|OTHER: laboratory biomarker analysis
Sponsor: Alliance for Clinical Trials in Oncology
Collaborators: National Cancer Institute (NCI)