- Patients =< 65 years old who are at high risk of regimen related toxicity through pre-existing chronic disease affecting liver, lungs, and/or heart, or others who wish to be treated on this protocol, will be considered on a case-by-case basis; transplants should be approved for these inclusion criteria by both the participating institutions' patient review committees such as the Patient Care Conference (PCC) at the Fred Hutchinson Cancer Research Center (FHCRC) and by the principal investigators at the collaborating centers; patients =< 65 years of age who have received previous high-dose transplantation do not require patient review committee approvals; all children < 12 years must be discussed with the FHCRC principal investigator (PI) (Brenda Sandmaier, MD 206-667-4961) prior to registration