POST TRANSPLANT DONOR LYMPHOCYTE INFUSION (DLI): Patients with stable mixed chimerism on day 56, and without evidence of GVHD, undergo DLI IV over 30 minutes on day 65. Patients without a complete response, full donor chimerism, and GVHD after 2 months undergo further DLI at higher cell numbers. Up to 6 DLIs may be given 65 days apart.