Umbilical CordFetal BloodUmbilical VeinsLeukocytes, MononuclearUmbilical ArteriesCord Blood Stem Cell TransplantationSpinal CordCells, CulturedLymphocytesPeripheral NervesFlow CytometryT-LymphocytesSpinal Cord InjuriesPregnancyMonocytesBlood CellsAntigens, CD34Lymphocyte ActivationHematopoietic Stem CellsHernia, UmbilicalPeripheral Blood Stem Cell TransplantationAntigens, CDInfant, NewbornImmunophenotypingHematopoietic Stem Cell TransplantationUrachal CystCell SeparationPeripheral Nervous SystemLeukocyte CountPeripheral Nervous System DiseasesLeukocytesTime FactorsBlood BanksB-LymphocytesRNA, MessengerCytokinesCell DifferentiationPhytohemagglutininsHematopoietic Stem Cell MobilizationCD4-Positive T-LymphocytesInterferon-gammaPeripheral Vascular DiseasesPolymerase Chain ReactionBlood Cell CountWharton JellyHuman Umbilical Vein Endothelial CellsBone MarrowUltrasonography, PrenatalAntibodies, MonoclonalBone Marrow CellsInterleukin-2Mesenchymal Stromal CellsUmbilicusKiller Cells, NaturalGranulocyte Colony-Stimulating FactorT-Lymphocyte SubsetsReverse Transcriptase Polymerase Chain ReactionGestational AgeLymphocyte CountTransplantation, AutologousEndothelium, VascularLeukapheresisFetusColony-Forming Units AssayMolecular Sequence DataTransplantation, HomologousPeripheral Nerve InjuriesMaternal-Fetal ExchangeAntigens, CD3Biological MarkersPlacentaStem CellsEndothelial CellsCoculture TechniquesNeutrophilsCD8-Positive T-LymphocytesCytotoxicity, ImmunologicTumor Necrosis Factor-alphaPeripheral Arterial DiseaseAntigens, CD45Case-Control StudiesCell Culture TechniquesCell LineHematopoiesisEnzyme-Linked Immunosorbent AssayCell DivisionRecombinant ProteinsBase SequenceNeoplastic Cells, CirculatingGene Expression RegulationCell ProliferationMice, SCIDGraft vs Host DiseasePokeweed MitogensPhenotypeHIV-1Rosette FormationHLA-DR AntigensClone CellsLymphocyte Subsets