Arthritis, PsoriaticRheumatologyArthritis, RheumatoidArthritisPsoriasisArthritis, ExperimentalArthritis, InfectiousArthritis, JuvenileAntirheumatic AgentsRheumatic DiseasesJointsArthritis, ReactiveSpondylitis, AnkylosingSynovial MembraneSynovial FluidSeverity of Illness IndexSynovitisRheumatoid FactorMethotrexateHand JointsNail DiseasesReceptors, Tumor Necrosis FactorSpondylarthropathiesOsteoarthritisBlood SedimentationArthrographyTumor Necrosis Factor-alphaSpondylitisAntibodies, MonoclonalFinger JointToe JointSpondylarthritisTreatment OutcomeImmunoglobulin GFoot JointsAntibodies, Monoclonal, HumanizedPeriostitisDermatologic AgentsArthritis, GoutyHLA-C AntigensHLA-B27 AntigenAutoantibodiesInjections, Intra-ArticularDisability EvaluationMice, Inbred DBASacroiliac JointDouble-Blind MethodKnee JointBiological ProductsGenetic Predisposition to DiseaseLupus Erythematosus, SystemicAnti-Inflammatory AgentsDrug Therapy, CombinationBiological MarkersJoint DiseasesIritisCohort StudiesImmunosuppressive AgentsAutoimmune DiseasesAnti-Inflammatory Agents, Non-SteroidalAge of OnsetCollagen Type IIImmunologic FactorsCase-Control StudiesQuality of LifeFibromyalgiaAntibodies, AntinuclearQuestionnairesSulfasalazineProspective StudiesHealth StatusMetacarpophalangeal JointRats, Inbred LewFollow-Up StudiesPeptides, CyclicEtretinate