- Determine the 1-year progression-free and overall survival rate in patients with relapsed Hodgkin's or non-Hodgkin's lymphoma after prior autologous stem cell transplantation treated with a nonmyeloablative conditioning regimen comprising fludarabine and melphalan followed by allogeneic bone marrow or peripheral blood stem cell transplantation and immunosuppression comprising tacrolimus and methotrexate.