Arthritis, PsoriaticArthritis, RheumatoidArthritisPsoriasisArthritis, ExperimentalArthritis, InfectiousArthritis, JuvenileArthritis, ReactiveJointsAntirheumatic AgentsSynovial MembraneSpondylitis, AnkylosingSynovial FluidSynovitisNail DiseasesSeverity of Illness IndexRheumatic DiseasesHand JointsRheumatoid FactorSpondylitisSpondylarthropathiesOsteoarthritisToe JointReceptors, Tumor Necrosis FactorMethotrexateTumor Necrosis Factor-alphaBlood SedimentationArthrographyFinger JointFoot JointsAntibodies, MonoclonalSpondylarthritisImmunoglobulin GPeriostitisDermatologic AgentsTreatment OutcomeArthritis, GoutyHLA-C AntigensRheumatologyAntibodies, Monoclonal, HumanizedMice, Inbred DBASacroiliac JointHLA-B27 AntigenGenetic Predisposition to DiseaseAutoantibodiesKnee JointInjections, Intra-ArticularIritisDisability EvaluationAnti-Inflammatory AgentsDouble-Blind MethodCollagen Type IIJoint DiseasesBiological MarkersAutoimmune DiseasesCase-Control StudiesCohort StudiesBiological ProductsImmunosuppressive AgentsAge of OnsetRats, Inbred LewDrug Therapy, CombinationQuality of LifeImmunologic FactorsEtretinateHLA-B39 Antigen