de Vries M, van der Horst-Bruinsma I, van Hoogstraten I, van Bodegraven A, von Blomberg M, Ratnawati H, Dijkmans B. pANCA, ASCA, and OmpC antibodies in patients with ankylosing spondylitis without inflammatory bowel disease. J Rheumatol 2010;37:2340–4. The author’s name should read B. Mary E. von Blomberg. We regret the error.