Cord Blood Stem Cell TransplantationTransplantation, HomologousHematopoietic Stem Cell TransplantationGraft vs Host DiseaseTransplantation ConditioningFetal BloodHematologic NeoplasmsGraft vs Leukemia EffectTreatment OutcomeGraft vs Tumor EffectLeukemiaTransplantation, AutologousBone Marrow TransplantationRetrospective StudiesSpinal CordRecurrenceTime FactorsAcute DiseaseSpinal Cord InjuriesSurvival RateFollow-Up StudiesTransplantation ChimeraGraft SurvivalProspective StudiesIsoantigensRisk FactorsT-LymphocytesHistocompatibility TestingTissue DonorsLymphocyte Culture Test, MixedUmbilical CordInfant, NewbornStem Cell TransplantationHistocompatibilityWhole-Body IrradiationBlood BanksAntigens, CD34Outcome Assessment (Health Care)Transplantation, IsogeneicHematopoietic Stem CellsPregnancyFacial ExpressionLymphocyte ActivationMyeloablative AgonistsSkin TransplantationGraft RejectionTransplantation ImmunologyImmunosuppressive AgentsGraft vs Host ReactionLeukemia, Myeloid, AcuteSurvival Analysis