Cord Blood Stem Cell TransplantationFetal BloodTransplantation, HomologousSpinal CordHematopoietic Stem Cell TransplantationBone Marrow TransplantationGraft vs Host DiseaseSpinal Cord InjuriesKidney TransplantationGraft SurvivalGraft RejectionTissue DonorsTransplantsTransplantation ConditioningUmbilical CordImmunosuppressive AgentsBlood BanksHematologic NeoplasmsHistocompatibility TestingRetrospective StudiesInfant, NewbornTreatment OutcomeAntigens, CD34Time FactorsTransplantation ChimeraEarly Detection of CancerHeart TransplantationHematopoietic Stem CellsT-LymphocytesSurvival AnalysisLeukemia