Kidney Function TestsAcute Kidney InjuryKidneyKidney DiseasesGlomerular Filtration RateLiver Function TestsCreatinineKidney TransplantationCystatin CRespiratory Function TestsKidney TubulesKidney Failure, ChronicLipocalinsKidney Tubular Necrosis, AcuteRenal Replacement TherapyThyroid Function TestsBiological MarkersRenal Insufficiency, ChronicKidney CortexAzotemiaAcute-Phase ProteinsKidney Tubules, ProximalKidney GlomerulusRenal InsufficiencyRisk FactorsTime FactorsProspective StudiesPolycystic Kidney DiseasesCritical IllnessReperfusion InjuryRetrospective StudiesProteinuriaAlbuminuriaPancreatic Function TestsKidney MedullaCystatinsTreatment OutcomeKidney NeoplasmsSeverity of Illness IndexRenal DialysisCohort StudiesChronic DiseaseBlood Urea NitrogenNephrectomyNephrology