Kidney TransplantationTissue DonorsLiving DonorsGraft SurvivalGraft RejectionImmunosuppressive AgentsTransplantation, HomologousTissue and Organ ProcurementCadaverTransplantationDirected Tissue DonationHeart TransplantationHistocompatibility TestingBone Marrow TransplantationLung TransplantationLiver TransplantationHistocompatibilityGraft vs Host DiseaseOrgan TransplantationTransplantsTreatment OutcomeHematopoietic Stem Cell TransplantationWaiting ListsRetrospective StudiesTacrolimusCytomegalovirus InfectionsTime FactorsCyclosporineUnrelated DonorsAntilymphocyte SerumPostoperative ComplicationsImmunosuppressionTransplantation ConditioningMycophenolic AcidImmunocompromised HostBlood DonorsWhole-Body IrradiationRisk FactorsSurvival RateTransplantation ImmunologyCytomegalovirusHeart-Lung TransplantationSurvival AnalysisBK VirusBronchiolitis ObliteransOpportunistic InfectionsGanciclovirLiver FailurePancreas TransplantationPolyomavirus InfectionsKidney Failure, ChronicFollow-Up StudiesLymphoproliferative DisordersMycosesAntiviral AgentsIsoantibodiesProspective StudiesBiopsyCreatinineIncidenceKidneyPostoperative PeriodSirolimusCalcineurinKidney DiseasesHLA AntigensRecurrenceAzathioprineFatal OutcomeTransplantation ToleranceAspergillosisLiver DiseasesDelayed Graft FunctionAntifungal AgentsDrug Therapy, CombinationCohort StudiesPrimary Graft DysfunctionPolymerase Chain ReactionGlomerular Filtration RateInfectionDrug MonitoringTransplantation, HeterotopicAcute DiseaseViremiaHepatitis CHematologic NeoplasmsDNA, ViralKidney Function TestsEnd Stage Liver DiseaseRenal InsufficiencyT-LymphocytesHerpesvirus 6, HumanRisk AssessmentBrain DeathProportional Hazards ModelsKaplan-Meier EstimateViral LoadIranMultivariate AnalysisIslets of Langerhans Transplantation