5. Prior chemotherapy for curative intent is permitted providing the cytotoxic chemotherapy was completed ≥12 months prior to enrollment. Patients must have a CT or MRI scan of the brain to evaluate for CNS disease within 30 days prior to registration. Patient must not have brain metastases unless: (1) metastases have been treated and have remained controlled for at least two weeks following treatment, AND (2) patient has no residual neurological dysfunction off corticosteroids for at least 1 day. Any radiation therapy completed prior to chemotherapy, except gamma-knife radiosurgery, 1 week prior to chemotherapy.