Cystatin CCystatinsAmyloidCystatin ACystatin BAmyloid beta-PeptidesSerum Amyloid A ProteinCreatinineAmyloid beta-Protein PrecursorGlomerular Filtration RateCerebral Amyloid AngiopathyPlaque, AmyloidSalivary CystatinsAmyloidosisBiological MarkersIslet Amyloid PolypeptideCysteine Proteinase InhibitorsNephelometry and TurbidimetryKidney Function TestsCerebrospinal Fluid ProteinsCathepsin BPapainCathepsinsSerum Amyloid P-ComponentLipocalinsAlzheimer DiseaseAmyloid NeuropathiesAmyloid Precursor Protein SecretasesKidney DiseasesCongo RedCathepsin HCathepsin LAcute Kidney InjuryRenal Insufficiency, ChronicRenal InsufficiencyCysteine EndopeptidasesAmyloid Neuropathies, Familialbeta 2-MicroglobulinAmino Acid SequenceIohexolPredictive Value of TestsKidneyPeptide FragmentsPrealbuminMolecular Sequence DataTechnetium Tc 99m PentetateIothalamic AcidProtease InhibitorsAcute-Phase ProteinsEndopeptidasesROC CurveAlbuminuriaProspective StudiesRisk FactorsBrainAspartic Acid EndopeptidasesAzotemiaDependent AmbulationCysteine ProteasesPresenilin-1Urine Specimen Collection