C-Reactive ProteinBlood SedimentationComplement C4Biological MarkersComplement C3Arthritis, RheumatoidAcute-Phase ReactionSerum Amyloid A ProteinTuberculosis, MiliarySpondylitis, AnkylosingNephelometry and TurbidimetryComplement C1qAntirheumatic AgentsLeukocyte CountGold Sodium ThiomalatePolyarteritis NodosaProspective StudiesMendelian Randomization AnalysisBacterial InfectionsRheumatoid FactorOrosomucoidAcute DiseasePolymyalgia RheumaticaStatistics, NonparametricSeverity of Illness IndexArthritis, PsoriaticComplement Hemolytic Activity AssaySerumMeningitis, ViralCalcitoninSynovitisLatex Fixation TestsComplement Activating EnzymesFeverCrohn DiseaseComplement System ProteinsComplement C3dTime FactorsImmunoglobulin GComplement C1 Inhibitor ProteinInfant, Premature, DiseasesSynovial FluidOsteoarthritisAcute-Phase ProteinsEnzyme-Linked Immunosorbent AssayComplement C5AngioedemaCase-Control StudiesInfant, NewbornComplement C1ArthritisSepsisRisk FactorsInterleukin-6Complement C4aBlood Protein DisordersTreatment OutcomeCross-Sectional StudiesPredictive Value of TestsPrognosisComplement C7PancreatitisFollow-Up StudiesComplement ActivationSensitivity and SpecificityComplement Factor BDouble-Blind MethodPrednisoloneAntigen-Antibody ComplexAngina, UnstableFalse Positive ReactionsSerum AlbuminInflammationAnalysis of VarianceCardiovascular DiseasesCryoglobulinsInflammation MediatorsAnti-Inflammatory AgentsComplement C4bROC CurveTumor Necrosis Factor-alphaAntibodies, MonoclonalAutoantibodiesLupus Erythematosus, SystemicChi-Square DistributionLipids