Gemcitabine +/- Imatinib Mesylate, Patients w/Previously Treated Metastatic Breast Cancer

University of Maryland Greenebaum Cancer Center, Baltimore

Robert H. Lurie Comprehensive Cancer Center at Northwestern University, Chicago

Cooper Hospital/University Medical Center, Camden

Rutgers Cancer Institute of New Jersey at Hamilton, Hamilton

Mountainside Hospital, Montclair

Jersey Shore Cancer Center at Jersey Shore University Medical Center, Neptune City

Rutgers Cancer Institute of New Jersey, New Brunswick

Saint Peter's University Hospital, New Brunswick

NJ Medical School, Newark