Hematopoietic Stem CellsFetal BloodHematopoietic Stem Cell TransplantationUmbilical CordCord Blood Stem Cell TransplantationStem CellsRegistriesTissue DonorsAntigens, CD34Transplantation, HomologousHematopoiesisHematopoietic Stem Cell MobilizationCell DifferentiationBlood BanksBone Marrow CellsCells, CulturedCell LineageDonor SelectionHistocompatibility TestingColony-Forming Units AssayStem Cell TransplantationUmbilical VeinsGraft vs Host DiseaseTransplantation ConditioningUmbilical ArteriesInfant, NewbornFlow CytometryHematologic NeoplasmsCell SeparationStem Cell FactorPregnancyEmbryonic Stem CellsStem Cell NicheMesenchymal Stromal CellsGranulocyte Colony-Stimulating FactorMice, SCIDAdult Stem CellsHematopoietic SystemBone MarrowCell Culture TechniquesSpinal CordMice, Inbred C57BLGraft SurvivalMice, Inbred NODTransplantation ChimeraAntigens, CDCell ProliferationMultipotent Stem CellsBone Marrow TransplantationLeukemiaFetal Stem CellsBlood DonorsTime FactorsT-LymphocytesTransplantation, AutologousAntigens, CD38Pluripotent Stem CellsBlood CellsWhole-Body IrradiationMesenchymal Stem Cell TransplantationLymphocytesImmunophenotypingChimerismTreatment OutcomeTransduction, GeneticCell DivisionMyeloablative AgonistsRetroviridaeSpleenFetusADP-ribosyl CyclaseCoculture TechniquesProto-Oncogene Proteins c-kitMesonephrosUnrelated DonorsBlood Cell CountMaternal-Fetal ExchangeSpinal Cord InjuriesInduced Pluripotent Stem CellsGenetic VectorsHematologic DiseasesStromal CellsBlood PreservationMyeloid Progenitor CellsHematopoietic Cell Growth FactorsHistocompatibilityAntigens, CD45Interleukin-3ThrombopoietinTransplantation, HeterologousNeural Stem CellsHLA AntigensLentivirusCell LineCell SurvivalSignal TransductionReverse Transcriptase Polymerase Chain ReactionRetrospective StudiesHernia, UmbilicalBusulfan