 9. At least 14 days must have elapsed since the completion of local palliative external beam radiotherapy XRT - small port and the start of study treatment. At least 6 months must have elapsed if prior total body irradiation TBI, craniospinal XRT, or if radiation to 50 or more of pelvis; and at least 42 days must have elapsed if other substantial bone marrow radiation 20 or more of marrow - see Appendix F. 