Same Day Dosing of Pegfilgrastim in Breast Cancer Patients Undergoing Chemotherapy (TAC)

Inclusion Criteria: - Breast cancer, previously untreated Exclusion Criteria: - Active infection requiring treatment with systemic (intravenous or oral) anti-infectives (antibiotic, antifungal, antiviral) within 72 hours of chemotherapy - Prior malignancy within the last 5 years, with the exception of surgically cured basal/squamous skin cell carcinoma, ductal carcinoma in situ of the breast and/or carcinoma of the cervix in situ - History of impaired cardiac status (e.g., severe heart disease, cardiomyopathy or congestive heart failure) - Major surgery within 2 weeks prior to randomization - Previous exposure to cytokines within two weeks prior - Concurrent use of other investigational agents