Arthritis, RheumatoidArthritisAntibodiesArthritis, ExperimentalArthritis, InfectiousSynovial MembraneAntirheumatic AgentsAntibody SpecificityArthritis, JuvenileAntibodies, MonoclonalRheumatoid FactorSynovial FluidAntibodies, ViralArthritis, PsoriaticJointsAntibodies, BacterialArthritis, ReactiveAutoantibodiesSynovitisAntibody FormationOsteoarthritisAntibodies, NeutralizingMethotrexateImmunoglobulin GBlood SedimentationSeverity of Illness IndexAntibodies, Anti-IdiotypicFluorescent Antibody TechniqueAntibody AffinityAntibodies, AntinuclearSulfasalazineEpitopesRheumatoid NoduleMetacarpophalangeal JointGold Sodium ThiomalateTumor Necrosis Factor-alphaPeptides, CyclicImmunoglobulin MArthrographyRheumatologyBinding Sites, AntibodyMice, Inbred DBAHLA-DRB1 ChainsRheumatic DiseasesWrist JointHLA-DR AntigensAntigen-Antibody ComplexAutoimmune DiseasesAntibodies, Monoclonal, HumanizedFinger JointHLA-DR4 AntigenLupus Erythematosus, SystemicEnzyme-Linked Immunosorbent AssayCollagen Type IITreatment OutcomeCitrullineHIV AntibodiesCross ReactionsAntibodies, NeoplasmReceptors, Tumor Necrosis FactorCells, CulturedSpondylitis, AnkylosingAntibodies, ProtozoanT-LymphocytesBiological MarkersArthritis, GoutyOrganogold CompoundsFoot JointsMolecular Sequence DataImmunoglobulin ADrug Therapy, CombinationMice, Inbred BALB CAutoantigensAnti-Inflammatory AgentsCase-Control StudiesIsoxazolesTime FactorsHydroxychloroquineB-LymphocytesPenicillamineKnee JointCytokinesRats, Inbred LewAntibodies, BlockingAmino Acid SequenceImmunoglobulin Fab FragmentsInjections, Intra-ArticularAntigen-Antibody ReactionsDisease Models, AnimalFibroblastsPrednisoloneAntibodies, FungalAntibodies, Monoclonal, Murine-DerivedJoint DiseasesHand JointsSjogren's SyndromeDisability EvaluationNeutralization TestsGenetic Predisposition to DiseaseSpondylarthropathies