Transplantation, HomologousBone Marrow TransplantationUmbilical CordGraft vs Host DiseaseFetal BloodUmbilical VeinsUmbilical ArteriesCord Blood Stem Cell TransplantationSpinal CordLeukocytes, MononuclearTissue DonorsBlood DonorsCells, CulturedSpinal Cord InjuriesPregnancyFlow CytometryHernia, UmbilicalLymphocytesT-LymphocytesAntigens, CD34Living DonorsUrachal CystInfant, NewbornHematopoietic Stem CellsMonocytesLymphocyte ActivationBlood BanksAntigens, CDBlood CellsImmunophenotypingHematopoietic Stem Cell TransplantationCell SeparationPeripheral NervesWharton JellyTime FactorsCell DifferentiationHuman Umbilical Vein Endothelial CellsMesenchymal Stromal CellsCytokinesUltrasonography, PrenatalUmbilicusHematopoietic Stem Cell MobilizationCD4-Positive T-LymphocytesRNA, MessengerInterferon-gammaPeripheral Blood Stem Cell TransplantationB-LymphocytesGestational AgeEndothelium, VascularLeukocytesReverse Transcriptase Polymerase Chain ReactionFetusCoculture TechniquesPolymerase Chain ReactionLeukocyte CountKiller Cells, NaturalBone Marrow CellsEnzyme-Linked Immunosorbent AssayMaternal-Fetal ExchangeBlood Cell CountGranulocyte Colony-Stimulating FactorPlacentaEndothelial CellsLeukapheresisPhytohemagglutininsAntibodies, MonoclonalCell Culture TechniquesT-Lymphocyte SubsetsCase-Control StudiesCD8-Positive T-LymphocytesCytotoxicity, ImmunologicStem CellsMolecular Sequence DataCell ProliferationGraft SurvivalInterleukin-2Peripheral Nervous SystemBone MarrowAntigens, CD3Tumor Necrosis Factor-alphaFetal HypoxiaPeripheral Nervous System DiseasesLymphocyte CountBiological MarkersNeutrophilsAntigens, CD45HLA-DR AntigensHistocompatibility TestingMice, SCIDRecombinant ProteinsDendritic CellsColony-Forming Units AssayCell LineCell DivisionGene Expression RegulationImmunoglobulin GBlood PreservationLeukemiaTransplantation ConditioningHematologic Neoplasms