- Arm I: Patients receive fludarabine IV on days -4 to -2. Patients undergo total body irradiation followed by allogeneic peripheral blood stem cell transplantation (PBSCT) on day 0. Patients receive graft-versus-host disease (GVHD) prophylaxis comprising oral cyclosporine twice daily on days -2 to 90 followed by a taper on days 90-150 and oral mycophenolate mofetil twice daily on days 0-28.