Kidney Function TestsCreatinineKidneyKidney DiseasesGlomerular Filtration RateLiver Function TestsMetabolic Clearance RateCystatin CKidney Failure, ChronicRenal InsufficiencyRespiratory Function TestsKidney TransplantationAcute Kidney InjuryProteinuriaKidney TubulesCystatinsRenal Insufficiency, ChronicBiological MarkersThyroid Function TestsUreaTime FactorsBlood Urea NitrogenProspective StudiesAlbuminuriaDiabetic NephropathiesKidney GlomerulusRisk FactorsNephrectomyRetrospective StudiesTreatment OutcomeIothalamic AcidPeritoneal Dialysis, Continuous AmbulatoryBlood PressureFollow-Up StudiesHalf-LifeChronic DiseasePeritoneal DialysisKidney CortexPancreatic Function TestsInulinRenal DialysisCohort StudiesAnuriaTechnetium Tc 99m PentetateImmunosuppressive AgentsRenal CirculationDisease ProgressionPredictive Value of Tests