Arthritis, PsoriaticPsoriasisArthritis, RheumatoidArthritisArthritis, ExperimentalArthritis, InfectiousArthritis, JuvenileArthritis, ReactiveJointsAntirheumatic AgentsDermatologic AgentsSynovial MembraneSpondylitis, AnkylosingSynovial FluidNail DiseasesSeverity of Illness IndexSynovitisRheumatic DiseasesHand JointsRheumatoid FactorReceptors, Tumor Necrosis FactorHLA-C AntigensSpondylitisTumor Necrosis Factor-alphaMethotrexateSpondylarthropathiesToe JointOsteoarthritisAntibodies, MonoclonalArthrographyBlood SedimentationFinger JointImmunoglobulin GSpondylarthritisFoot JointsTreatment OutcomePeriostitisAntibodies, Monoclonal, HumanizedArthritis, GoutyGenetic Predisposition to DiseaseRheumatologySkinPUVA TherapyUltraviolet TherapySacroiliac JointHLA-B27 AntigenMice, Inbred DBAAnti-Inflammatory AgentsIritisAutoantibodiesKnee JointInjections, Intra-ArticularDouble-Blind MethodCase-Control StudiesBiological ProductsImmunosuppressive AgentsBiological MarkersAutoimmune DiseasesImmunologic FactorsCollagen Type IIDisability EvaluationAge of OnsetCornified Envelope Proline-Rich ProteinsEtretinateJoint DiseasesCohort StudiesNailsQuality of LifeGene FrequencyCytokinesDrug Therapy, CombinationRats, Inbred LewHLA AntigensAnti-Inflammatory Agents, Non-SteroidalCoal Tar