SulfasalazineSulfapyridineMesalamineAminosalicylic AcidsAnti-Inflammatory Agents, Non-SteroidalAntirheumatic AgentsHydroxychloroquineGastrointestinal AgentsAmino Acid Transport System y+PhenylhydrazinesArthritis, RheumatoidMethotrexateGlycochenodeoxycholic AcidIsoxazolesColitis, UlcerativeDrug Therapy, CombinationTripterygiumNF-kappa BEarly Termination of Clinical TrialsSpondylarthritisSalicylatesInflammatory Bowel DiseasesDouble-Blind MethodTreatment Outcome