Cystatin CCystatinsCystatin ACystatin BCreatinineGlomerular Filtration RateSalivary CystatinsBiological MarkersCysteine Proteinase InhibitorsKidney Function TestsNephelometry and TurbidimetryCerebrospinal Fluid ProteinsCathepsin BPapainCathepsinsLipocalinsKidney DiseasesCathepsin HCathepsin LAcute Kidney InjuryCerebral Amyloid AngiopathyRenal Insufficiency, ChronicRenal InsufficiencyCysteine EndopeptidasesIohexolPredictive Value of TestsKidneyTechnetium Tc 99m PentetateIothalamic AcidROC CurveProtease InhibitorsAlbuminuriaProspective Studiesbeta 2-MicroglobulinAcute-Phase ProteinsAzotemiaRisk FactorsDependent AmbulationCysteine ProteasesUrine Specimen Collection