Arthritis, RheumatoidArthritisDisease SusceptibilityArthritis, ExperimentalGenetic Predisposition to DiseasePelvic Inflammatory DiseaseSynovial MembraneArthritis, InfectiousArthritis, JuvenileAntirheumatic AgentsSynovial FluidRheumatoid FactorArthritis, PsoriaticPolymorphism, Single NucleotideJointsGenotypeAllelesArthritis, ReactiveHaplotypesSynovitisPolymorphism, GeneticCase-Control StudiesHLA-DRB1 ChainsOsteoarthritisInflammationAutoimmune DiseasesAutoantibodiesMethotrexateGene FrequencyHLA-DR AntigensTumor Necrosis Factor-alphaGenome-Wide Association StudySeverity of Illness IndexBlood SedimentationLupus Erythematosus, SystemicMice, Inbred DBALinkage DisequilibriumImmunoglobulin GSulfasalazineSpondylitis, AnkylosingCytokinesGenetic VariationRheumatic DiseasesGenetic LinkageRheumatoid NoduleMetacarpophalangeal JointGenetic MarkersPeptides, CyclicAnti-Inflammatory AgentsGold Sodium ThiomalateArthrographyDisease Models, AnimalChromosome MappingCrohn DiseaseCells, CulturedMicrobial Sensitivity TestsRheumatologyPhenotypeMice, Inbred C57BLHLA-DQ AntigensPsoriasisAntibodies, MonoclonalImmunity, InnateWrist JointNod2 Signaling Adaptor ProteinBiological MarkersHLA-DR4 AntigenTreatment OutcomeGenetic Association StudiesCollagen Type IIReceptors, Tumor Necrosis FactorGenome, HumanT-LymphocytesFinger JointHLA-DQ beta-ChainsHLA-DR3 AntigenMolecular Sequence DataAnti-Bacterial AgentsCohort StudiesEpistasis, GeneticRisk FactorsSignal TransductionHLA AntigensCitrullineComplement C4aGenetic LociTime FactorsInflammatory Bowel DiseasesAutoimmunityMacrophagesMice, KnockoutDrug Therapy, CombinationEnzyme-Linked Immunosorbent AssayGenes, MHC Class IIPolymerase Chain ReactionGene Expression RegulationAutoantigensRats, Inbred LewInflammation MediatorsArthritis, Gouty