AzathioprineArthritis, RheumatoidArthritisArthritis, ExperimentalArthritis, InfectiousSynovial MembraneImmunosuppressive AgentsAntirheumatic Agents6-MercaptopurineArthritis, JuvenileSynovial FluidRheumatoid FactorArthritis, PsoriaticJointsArthritis, ReactivePrednisoloneMethotrexateSynovitisOsteoarthritisSulfasalazineDrug Therapy, CombinationSeverity of Illness IndexBlood SedimentationAutoantibodiesTreatment OutcomeAnti-Inflammatory AgentsRheumatoid NoduleMetacarpophalangeal JointGold Sodium ThiomalateArthrographyTumor Necrosis Factor-alphaRheumatologyCrohn DiseaseImmunoglobulin GPeptides, CyclicMethyltransferasesPrednisoneInflammatory Bowel DiseasesMycophenolic AcidAntibodies, MonoclonalRheumatic DiseasesHLA-DRB1 ChainsCyclosporineWrist JointMice, Inbred DBAAdrenal Cortex HormonesAutoimmune DiseasesOrganogold CompoundsHepatitis, AutoimmuneLupus Erythematosus, SystemicKidney TransplantationFinger JointColitis, UlcerativeHLA-DR4 AntigenGlucocorticoidsThioguanineHLA-DR AntigensMethylprednisoloneCollagen Type IIPenicillamineHydroxychloroquineCitrullineFollow-Up StudiesSpondylitis, AnkylosingReceptors, Tumor Necrosis FactorArthritis, GoutyFoot JointsBiological MarkersTime FactorsImmunosuppressionLeukopeniaGraft RejectionIsoxazolesAnti-Inflammatory Agents, Non-SteroidalKnee JointDouble-Blind MethodProspective StudiesCase-Control StudiesInjections, Intra-ArticularGastrointestinal AgentsMesalamineRemission InductionVasculitisT-LymphocytesCells, CulturedHand JointsDisability EvaluationJoint DiseasesRetrospective StudiesAntimetabolitesClinical Trials as TopicRats, Inbred LewCyclosporinsEnzyme-Linked Immunosorbent AssayCohort StudiesCytokinesGenetic Predisposition to DiseaseSpondylarthropathiesAuranofinChronic Disease