The use of bone marrow and stem cell transplantation (BMT/SCT) in the treatment of cancer has increased five-fold over the last decade. Among the cancers treated with BMT/SCT are Hodgkin's Lymphoma, non-Hodgkin's Lymphoma, multiple myeloma, and leukemias such as acute lymphoblastic (ALL), acute myelogenous (AML), chronic lymphocytic (CLL), and chronic myelogenous (CML). With the development of non-myeloablative transplants (either "mini" or reduced intensity transplants) for patients unable to tolerate standard BMT/SCT, the use of this procedure is expected to increase substantially over the next five years. BMT/SCT adversely affects almost every aspect of the patient's life (1;2). A standard (fully ablative) transplant involves conditioning with dose intensive chemotherapy, with or without total body irradiation.