Cord Blood Stem Cell TransplantationHematopoietic Stem CellsHematopoietic Stem Cell TransplantationFetal BloodTransplantation, HomologousStem CellsSpinal CordGraft vs Host DiseaseAntigens, CD34HematopoiesisBone Marrow TransplantationTransplantation ConditioningStem Cell TransplantationSpinal Cord InjuriesBone Marrow CellsHematopoietic Stem Cell MobilizationHematologic NeoplasmsCell LineageColony-Forming Units AssayCell DifferentiationTransplantation ChimeraUmbilical CordMice, Inbred C57BLFlow CytometryGraft SurvivalCells, CulturedBlood BanksCell SeparationStem Cell NicheBone MarrowHistocompatibility TestingTransplantation, AutologousLeukemiaWhole-Body IrradiationTissue DonorsMice, SCIDInfant, NewbornT-LymphocytesStem Cell FactorAdult Stem CellsMice, Inbred NODHistocompatibilityAntigens, CDCell ProliferationNeoplastic Stem CellsGraft vs Leukemia EffectPlant StemsChimerismTime Factors