Arthritis, InfectiousArthritis, RheumatoidArthritisArthritis, ExperimentalArthritis, JuvenileArthritis, PsoriaticArthritis, ReactiveSynovial MembraneJointsSynovial FluidArthritis, GoutyRheumatoid FactorMice, Inbred DBASynovitisOsteoarthritisCollagen Type IIMethotrexateSeverity of Illness IndexRats, Inbred LewAutoantibodiesBlood SedimentationInjections, Intra-ArticularTumor Necrosis Factor-alphaRheumatic Diseases