Cord Blood Stem Cell TransplantationUnrelated DonorsTissue DonorsTransplantation, HomologousGraft vs Host DiseaseFetal BloodHistocompatibility TestingHematopoietic Stem Cell TransplantationBone Marrow TransplantationHistocompatibilityTransplantation ConditioningHematologic NeoplasmsSpinal CordBlood DonorsLiving DonorsGraft SurvivalHLA AntigensLeukemiaRecurrenceAnemia, AplasticTransplantation ChimeraSpinal Cord InjuriesTreatment OutcomeWhole-Body IrradiationPeripheral Blood Stem Cell TransplantationMyeloablative AgonistsVidarabineDonor SelectionAntilymphocyte SerumPrecursor Cell Lymphoblastic Leukemia-LymphomaSiblingsSurvival AnalysisBusulfanImmunosuppressive AgentsInfant, NewbornUmbilical CordLeukemia, Myelogenous, Chronic, BCR-ABL PositiveRetrospective StudiesHematologic DiseasesBlood BanksStem Cell TransplantationLymphocyte DepletionGraft RejectionDisease-Free SurvivalT-LymphocytesAntigens, CD34Survival RateTransplantation ImmunologyMyelodysplastic SyndromesAcute DiseaseLeukemia, Myeloid, AcuteAllograftsHLA-DP beta-ChainsHematopoietic Stem CellsGraft vs Leukemia EffectGraft vs Tumor EffectRemission InductionTime FactorsTransplantation, AutologousDirected Tissue Donation