Figure 1From: Increased circulating levels and salivary gland expression of interleukin-18 in patients with Sjögren's syndrome: relationship with autoantibody production and lymphoid organization of the periductal inflammatory infiltrateSerum IL-18 concentrations in patients with Sjögren's syndrome (SS) and relationship with the presence of anti-SSA/Ro and anti-SSB/La antibodies. Box–whisker plots showing serum IL-18 concentration in patients with SS compared with patients with rheumatoid arthritis (RA) and normal healthy subjects (NHS) (a), and in patients with SS who are positive or negative for anti-SSA/Ro (b) or anti-SSB/La antibodies (c). See text for statistical analysis.Back to article page