Cord Blood Stem Cell TransplantationTransplantation, HomologousHematopoietic Stem Cell TransplantationStem Cell TransplantationFetal BloodUmbilical CordGraft vs Host DiseaseTransplantation ConditioningHematologic NeoplasmsTransplantation, AutologousCytomegalovirus InfectionsHistocompatibility TestingRoseolovirus InfectionsStem CellsAspergillosisBone Marrow TransplantationHematopoietic Stem CellsTreatment OutcomeCytomegalovirusTissue DonorsTransplantation ChimeraGraft SurvivalRetrospective StudiesBlood BanksAntigens, CD34Peripheral Blood Stem Cell TransplantationSpinal CordRecurrenceKidney TransplantationImmunosuppressive AgentsBusulfanGraft vs Leukemia EffectMyeloablative AgonistsLeukemiaInfant, NewbornTransplantationLiver TransplantationTime FactorsHistocompatibilityUmbilical VeinsVidarabineCells, CulturedCell DifferentiationWhole-Body IrradiationRemission InductionUmbilical ArteriesSpinal Cord InjuriesPregnancyT-LymphocytesGraft vs Tumor EffectGraft RejectionLeukemia, Myeloid, AcuteImmunocompromised HostMesenchymal Stromal CellsFlow CytometryAnemia, AplasticHematologic DiseasesCell SeparationHematopoietic Stem Cell MobilizationSurvival AnalysisSiblingsLeukemia, Myelogenous, Chronic, BCR-ABL PositivePrecursor Cell Lymphoblastic Leukemia-LymphomaHLA AntigensSurvival RateEmbryonic Stem CellsMultiple MyelomaHeart TransplantationTransplantation ImmunologyCombined Modality TherapyChimerismBone Marrow CellsLymphocyte DepletionSalvage TherapyAcute DiseaseAntigens, CDOpportunistic InfectionsImmunosuppressionImmunophenotypingBlood Transfusion, AutologousMesenchymal Stem Cell TransplantationCell TransplantationAntilymphocyte SerumVirus ActivationAdult Stem CellsLung TransplantationFollow-Up StudiesMycosesCell Culture TechniquesTransplantsMyelodysplastic SyndromesDisease-Free SurvivalHepatic Veno-Occlusive DiseaseMice, SCIDCell LineageLymphocyte TransfusionMinor Histocompatibility AntigensColony-Forming Units AssayMaternal-Fetal ExchangeHerpesvirus 6, Human