Fig. 2From: Anti-SIRT1 autoantibody is elevated in ankylosing spondylitis: a potential disease biomarkerSerum anti-SIRT1 antibody levels in patients with AS, RA, and PsA as well as healthy controls were determined by ELISA. * P < 0.05, **P < 0.01, *** P < 0.001Back to article page