Arthritis, PsoriaticToesArthritisArthritis, RheumatoidPsoriasisFingersZinc FingersToe JointArthritis, ExperimentalAntirheumatic AgentsArthritis, InfectiousJointsSpondylitis, AnkylosingArthritis, JuvenileArthritis, ReactiveNail DiseasesSynovial MembraneSynovial FluidHand JointsRheumatic DiseasesSeverity of Illness IndexSynovitisSpondylitisSpondylarthropathiesReceptors, Tumor Necrosis FactorFinger JointFoot JointsRheumatoid FactorPeriostitisTumor Necrosis Factor-alphaSpondylarthritisDermatologic AgentsArthrographyMethotrexateAntibodies, MonoclonalOsteoarthritisBlood SedimentationHLA-C AntigensImmunoglobulin GTreatment OutcomeAntibodies, Monoclonal, HumanizedToe PhalangesBlue Toe SyndromeSacroiliac JointHLA-B27 AntigenRheumatologyFootGenetic Predisposition to DiseaseIritisDouble-Blind MethodKnee JointHandEtretinateDisability EvaluationAnti-Inflammatory AgentsSkinHLA-B39 Antigen