Spondylitis, AnkylosingSpondylitisJointsSternocostal JointsHLA-B27 AntigenArthritis, PsoriaticSpondylarthritisSynovitisArthritis, RheumatoidAntirheumatic AgentsArthritisOsteoarthritisSacroiliac JointSeverity of Illness IndexKnee JointJoint DiseasesSpineFinger JointPeripheral NervesHip JointAnkle JointSpondylarthropathiesBlood SedimentationTarsal JointsWrist JointIritisArthritis, ReactiveTuberculosis, SpinalRheumatic DiseasesJoint CapsulePeripheral Nervous SystemBalneologyPeripheral Nervous System DiseasesLumbar VertebraeUveitis, AnteriorTreatment OutcomePeripheral Vascular DiseasesKyphosisAntibodies, MonoclonalImmunoglobulin GThoracic VertebraeSynovial FluidLeukocytes, MononuclearSternoclavicular JointHLA AntigensJoint InstabilityTumor Necrosis Factor-alphaCervical VertebraeTemporomandibular Joint DisordersAnti-Inflammatory Agents, Non-SteroidalAnkylosisOsteitis