Hematopoietic Stem Cell TransplantationStem Cell TransplantationTransplantation, HomologousStem CellsKidney TransplantationImmunosuppressive AgentsTransplantationTransplantation, AutologousHematopoietic Stem CellsCytomegalovirus InfectionsHematologic NeoplasmsGraft vs Host DiseaseGraft RejectionImmunocompromised HostEmbryonic Stem CellsCyclosporineTissue DonorsGraft SurvivalTransplantation ConditioningAdult Stem CellsBone Marrow TransplantationTreatment OutcomeTacrolimusPeripheral Blood Stem Cell TransplantationHeart TransplantationOrgan TransplantationRetrospective StudiesOpportunistic InfectionsPluripotent Stem CellsTime FactorsMycosesHistocompatibility TestingTransplantsCytomegalovirusAspergillosisRoseolovirus InfectionsStem Cell NicheLung TransplantationBK VirusLiver TransplantationPolyomavirus InfectionsPostoperative ComplicationsNeural Stem CellsMycophenolic AcidInduced Pluripotent Stem CellsMesenchymal Stem Cell TransplantationImmunosuppressionCell DifferentiationHematopoietic Stem Cell MobilizationRecurrenceAntiviral AgentsHistocompatibilityMultipotent Stem CellsGanciclovirAntifungal AgentsHerpesvirus 6, HumanMesenchymal Stromal CellsStem Cell FactorLymphoproliferative DisordersWhole-Body IrradiationHepatic Veno-Occlusive DiseaseRisk FactorsHematologic DiseasesFollow-Up StudiesLeukemiaDrug MonitoringProspective StudiesMultiple MyelomaFatal OutcomeTransplantation ImmunologyBusulfanTransplantation ChimeraSurvival AnalysisSurvival RateAcute DiseaseIncidenceAntigens, CD34Cells, CulturedCord Blood Stem Cell TransplantationCell LineageAnemia, AplasticCombined Modality TherapyViral LoadFlow CytometryZygomycosisStem Cell ResearchPolymerase Chain ReactionVirus ActivationSalvage TherapyBiological MarkersEpstein-Barr Virus InfectionsPlant StemsFetal Stem CellsNeoplasmsHLA AntigensKidney Failure, ChronicLiving DonorsAntilymphocyte SerumDNA, ViralNeutropenia