Levels (in pg/ml) of innate and adaptive cytokines and chemokines were assessed in synovial fluid (SF) from 14 patients with post-infectious LA, 5 with early rheumatoid arthritis (RA, <6 months from disease onset), 7 with established RA (>6 months from disease onset), and 12 with osteoarthritis (OA). Statistically significant differences between groups were determined by ANOVA (Tukey’s post-hoc), and p-value cutoffs are indicated in the figure.