Cord Blood Stem Cell TransplantationFetal BloodBone Marrow TransplantationHematopoietic Stem Cell TransplantationTransplantation, HomologousBone MarrowUmbilical CordGraft vs Host DiseaseBone Marrow CellsHematologic NeoplasmsTissue DonorsTransplantation ConditioningHistocompatibility TestingTransplantation ChimeraStem CellsHematopoietic Stem CellsTransplantation, AutologousStem Cell TransplantationTreatment OutcomeGraft SurvivalCytomegalovirus InfectionsLeukemiaBone and BonesWhole-Body IrradiationAntigens, CD34Anemia, AplasticImmunosuppressive AgentsKidney TransplantationBlood BanksImmunocompromised HostCell DifferentiationTransplantationTime FactorsHistocompatibilityTransplantsGraft RejectionCells, CulturedOpportunistic InfectionsUmbilical VeinsHematopoiesisRetrospective StudiesColony-Forming Units AssayUmbilical ArteriesInfant, NewbornMycosesHematologic DiseasesCytomegalovirusRecurrenceFlow CytometryImmunosuppressionBone Marrow DiseasesBone Marrow PurgingLeukemia, Myeloid, AcuteBusulfanCyclosporineMesenchymal Stromal CellsCell SeparationPeripheral Blood Stem Cell TransplantationBone Marrow ExaminationPrecursor Cell Lymphoblastic Leukemia-LymphomaHLA AntigensPregnancyAspergillosisMice, Inbred C57BLLeukemia, Myelogenous, Chronic, BCR-ABL PositiveEmbryonic Stem CellsBone Marrow NeoplasmsFatal OutcomeAcute DiseaseCell LineageSpinal CordSurvival AnalysisT-LymphocytesMesenchymal Stem Cell TransplantationAdult Stem CellsHematopoietic Stem Cell MobilizationGanciclovirAntigens, CDCombined Modality TherapyBone RemodelingImmunophenotypingStem Cell FactorPolymerase Chain ReactionSurvival RateMultiple MyelomaHepatic Veno-Occlusive DiseaseHeart TransplantationCell Culture TechniquesFollow-Up StudiesBlood CellsCyclophosphamideLymphocyte DepletionRadiation ChimeraHerpesvirus 6, HumanProspective StudiesPostoperative ComplicationsMyelodysplastic SyndromesMice, SCIDAntiviral AgentsBK Virus