Arthritis, PsoriaticPsoriasisArthritis, RheumatoidArthritisArthritis, ExperimentalArthritis, InfectiousArthritis, JuvenileArthritis, ReactiveJointsAntirheumatic AgentsDermatologic AgentsSynovial MembraneSpondylitis, AnkylosingSynovial FluidNail DiseasesSeverity of Illness IndexSynovitisRheumatic DiseasesHand JointsRheumatoid FactorReceptors, Tumor Necrosis FactorHLA-C AntigensTumor Necrosis Factor-alphaSpondylitisMethotrexateSpondylarthropathiesOsteoarthritisToe JointAntibodies, MonoclonalArthrographyImmunoglobulin GBlood SedimentationFinger JointSpondylarthritisFoot JointsTreatment OutcomePeriostitisAntibodies, Monoclonal, HumanizedGenetic Predisposition to DiseaseArthritis, GoutyRheumatologySkinPUVA TherapyUltraviolet TherapySacroiliac JointHLA-B27 AntigenMice, Inbred DBAAnti-Inflammatory AgentsAutoantibodiesCase-Control StudiesIritisKnee JointDouble-Blind MethodInjections, Intra-ArticularDisability EvaluationBiological MarkersCohort StudiesImmunosuppressive AgentsBiological ProductsAutoimmune DiseasesAge of OnsetCollagen Type IIImmunologic FactorsQuality of LifeJoint DiseasesCornified Envelope Proline-Rich ProteinsEtretinateNailsPrevalenceTime FactorsGene FrequencyDrug Therapy, CombinationRisk FactorsCytokinesProspective StudiesRats, Inbred LewQuestionnairesAnti-Inflammatory Agents, Non-SteroidalHLA AntigensCoal Tar