Kidney TransplantationGraft RejectionTransplantationImmunosuppressive AgentsHeart TransplantationLung TransplantationGraft SurvivalOrgan TransplantationLiver TransplantationTransplantsTransplantation, HomologousTissue DonorsTacrolimusCytomegalovirus InfectionsCyclosporinePostoperative ComplicationsImmunosuppressionMycophenolic AcidImmunocompromised HostBone Marrow TransplantationRetrospective StudiesTime FactorsTreatment OutcomeLiving DonorsCytomegalovirusHeart-Lung TransplantationTransplantation ImmunologyBK VirusBronchiolitis ObliteransOpportunistic InfectionsGanciclovirTissue and Organ ProcurementHematopoietic Stem Cell TransplantationPolyomavirus InfectionsLiver FailureRisk FactorsKidney Failure, ChronicPancreas TransplantationHistocompatibility TestingCadaverMycosesFollow-Up StudiesLymphoproliferative DisordersWaiting ListsAntiviral AgentsGraft vs Host DiseaseProspective StudiesIsoantibodiesBiopsySirolimusCreatinineCalcineurinIncidenceAntilymphocyte SerumPostoperative PeriodKidneyKidney DiseasesAzathioprineAspergillosisFatal OutcomeRecurrenceAntifungal AgentsDrug Therapy, CombinationLiver DiseasesTransplantation ToleranceSurvival RateHLA AntigensCohort StudiesSurvival AnalysisHistocompatibilityDrug MonitoringGlomerular Filtration RateDelayed Graft FunctionPrimary Graft DysfunctionInfectionPolymerase Chain ReactionViremiaTransplantation, HeterotopicAcute DiseaseRenal InsufficiencyKidney Function TestsHerpesvirus 6, HumanDNA, ViralEnd Stage Liver DiseaseHepatitis CViral LoadProportional Hazards ModelsRisk AssessmentIranKaplan-Meier EstimateHematologic NeoplasmsTumor Virus InfectionsMultivariate AnalysisEpstein-Barr Virus InfectionsPrognosisRoseolovirus InfectionsBiological MarkersIslets of Langerhans TransplantationTransplantation ChimeraT-Lymphocytes