PsoriasisArthritis, RheumatoidArthritisArthritis, ExperimentalArthritis, PsoriaticArthritis, InfectiousArthritis, JuvenileDermatologic AgentsArthritis, ReactivePUVA TherapyUltraviolet TherapyJointsSynovial MembraneSynovial FluidSeverity of Illness IndexHLA-C AntigensCoal TarSkinAcitretinArthritis, GoutyRheumatoid FactorAnthralinKeratolytic AgentsMice, Inbred DBAMethotrexateSynovitisKeratinocytesOsteoarthritisNail DiseasesTumor Necrosis Factor-alphaClobetasolImmunoglobulin GAnti-Inflammatory AgentsTreatment OutcomeAntibodies, MonoclonalCollagen Type IIDermatologyCase-Control StudiesGenetic Predisposition to DiseaseEpidermisPhototherapyReceptors, Tumor Necrosis FactorSpondylitis, AnkylosingInterleukin-17Biological TherapyAutoantibodiesRheumatic DiseasesRisk FactorsInterleukin-23Skin DiseasesQuestionnairesAutoimmune DiseasesRats, Inbred LewArthrographyBlood SedimentationScalp DermatosesChronic DiseaseRheumatologyDisease Models, AnimalDermatitis, AtopicQuality of LifeCytokinesAdministration, TopicalDermatitisInjections, Intra-ArticularT-LymphocytesCohort StudiesInflammationKnee JointPrevalenceTh17 Cells