19. No participation in other clinical trials, including those with other investigational agents within 21days of the start of this trial and throughout the duration of this trial. However co-enrollment on trials evaluating conditioning regimens, institutional protocols evaluating atorvastatin for acute GVHD prophylaxis, and stem cell collection protocols in transplant donors will be permitted. In addition patients randomized to standard-of-care (non experimental) arms of available phase II/III trials will be eligible for this study.