Spondylitis, AnkylosingArthritis, RheumatoidSpondylitisArthritisArthritis, ExperimentalAntirheumatic AgentsArthritis, InfectiousSynovial MembraneHLA-B27 AntigenArthritis, PsoriaticArthritis, JuvenileSynovial FluidRheumatoid FactorArthritis, ReactiveJointsSacroiliac JointBlood SedimentationSeverity of Illness IndexSynovitisOsteoarthritisRheumatic DiseasesMethotrexateSulfasalazineSpondylarthritisSpondylarthropathiesTumor Necrosis Factor-alphaImmunoglobulin GRheumatologySpineAutoantibodiesAntibodies, MonoclonalTreatment OutcomeReceptors, Tumor Necrosis FactorRheumatoid NoduleMetacarpophalangeal JointGold Sodium ThiomalateArthrographyHLA-DRB1 ChainsPeptides, CyclicMice, Inbred DBAWrist JointHLA-DR4 AntigenHLA-DR AntigensCollagen Type IIFinger JointIritisAnti-Inflammatory Agents, Non-SteroidalAutoimmune DiseasesCase-Control StudiesCitrullineDisability EvaluationJoint DiseasesGenetic Predisposition to DiseaseBiological MarkersAnti-Inflammatory AgentsLupus Erythematosus, SystemicC-Reactive ProteinDrug Therapy, CombinationIsoxazolesAntibodies, Monoclonal, HumanizedOsteitisArthritis, GoutyTuberculosis, SpinalOrganogold CompoundsHLA AntigensFoot JointsUveitis, AnteriorPsoriasisKnee JointDouble-Blind MethodEnzyme-Linked Immunosorbent AssayFollow-Up StudiesHydroxychloroquineBalneologyPenicillamineLumbar VertebraeInjections, Intra-ArticularPain MeasurementImmunoglobulin MPhenylbutazoneImmunoglobulin ACohort StudiesCytokinesSpinal DiseasesCells, CulturedCervical VertebraeHand JointsDisease ProgressionPainPrednisoloneRats, Inbred LewInflammationProspective StudiesAntigen-Antibody ComplexTime FactorsKyphosisThoracic VertebraeT-LymphocytesAuranofinAutoantigens