TAF9 and systemic lupus erythematosus: Sera from patients with SLE exhibited a significantly higher titer of anti-TAF9 IgG antibody compared with the sera from patients with RA (p < 0.001), AS (p = 0.037), gout (p < 0.001) and healthy individuals (p < 0.001), No statistically significant difference was detected when the sera were compared with those from the SS cohort (p = 0.163; Fig. 1c).