- Any prior chemotherapy must have been completed at least 4 weeks prior to start of this protocol and all side effects (except alopecia) resolved to grade 1 or less. Any prior radiation must have been completed at least 2 weeks prior to start of therapy. For prior mitomycin chemotherapy a 6-week interval is required. Patients must have completed prior trastuzumab at least 4 weeks prior to start of protocol therapy.