Organ TransplantationTracheaTransplantsTransplantationKidney TransplantationImmunosuppressive AgentsImmunocompromised HostGraft RejectionHeart TransplantationTissue and Organ ProcurementLung TransplantationTissue DonorsTransplantation ImmunologyCytomegalovirus InfectionsImmunosuppressionGraft SurvivalLymphoproliferative DisordersTransplantation, HomologousPostoperative ComplicationsLiver TransplantationGanciclovirOpportunistic InfectionsFacial TransplantationTracheal NeoplasmsCytomegalovirusBrain DeathTacrolimusCyclosporineSkin NeoplasmsTransplantation ToleranceMycophenolic AcidEyebrowsPancreas TransplantationTreatment OutcomeCryptococcosisKeratosis, ActinicRetrospective StudiesTime FactorsMycosesZygomycosisHeart-Lung TransplantationWaiting ListsLiving DonorsAntiviral AgentsMarital TherapyAntifungal AgentsBone Marrow TransplantationCadaverSeromaRisk FactorsTracheal DiseasesAcitretinCalcineurinSunscreening AgentsDeathHerpesvirus 4, HumanFatal OutcomeHistocompatibility TestingEpstein-Barr Virus InfectionsAspergillosisHerpesvirus 7, HumanIncidenceHematopoietic Stem Cell TransplantationCoccidioidomycosisHerpesvirus 6, HumanFollow-Up StudiesCohort StudiesHerpesviridae InfectionsTracheal StenosisPennsylvaniaProspective StudiesImmunocompetencePolymerase Chain ReactionGuinea PigsCarcinoma, Squamous CellHLA AntigensSunlightKidneyMicrosporidiosisSirolimusMuscle, SmoothImmune ToleranceLiver DiseasesViral Matrix ProteinsSurvival RateT-LymphocytesUnited StatesViremiaDNA, ViralTumor Virus InfectionsViral LoadFetal Tissue TransplantationRegistriesMultiple Organ FailureAntibodies, ViralOrgan SpecificityOrgan SizePrognosisImmune SystemLung