Cord Blood Stem Cell TransplantationFetal BloodHematopoietic Stem Cell TransplantationTransplantation, HomologousGraft SurvivalBone Marrow TransplantationHematopoietic Stem CellsTransplantation ChimeraGraft vs Host DiseaseMice, SCIDStem Cell TransplantationSpinal CordTransplantation ConditioningAntigens, CD34Mice, Inbred NODWhole-Body IrradiationInterleukin Receptor Common gamma SubunitTransplantation, HeterologousBlood CellsGraft Enhancement, ImmunologicHost vs Graft ReactionSevere Combined ImmunodeficiencySpinal Cord InjuriesBone Marrow CellsHematopoiesisRadiation ChimeraFlow CytometryChimerismMice, Inbred C57BLT-LymphocytesHematologic NeoplasmsCell DifferentiationBusulfanRadiationCells, CulturedUmbilical CordErythrocytesCell TransplantationTime FactorsHistocompatibility TestingStem CellsBone MarrowBlood Cell CountColony-Forming Units AssayModels, AnimalBlood BanksMesenchymal Stromal CellsCell LineageMesenchymal Stem Cell TransplantationLymphocyte DepletionMice, Inbred BALB CGraft RejectionInfant, NewbornSpleenHistocompatibilityTransplantation, AutologousTissue DonorsRegenerationAntigens, CD45Receptors, CXCR4LeukemiaChemokine CXCL12Transplantation, Isogeneic