Agarwal SK, Gourh P, Shete S, Paz G, Divecha D, Reveille JD, Assassi S, Tan FK, Mayes MD, Arnett FC. Association of interleukin 23 receptor polymorphisms with anti-topoisomerase-I positivity and pulmonary hypertension in systemic sclerosis. J Rheumatol 2009;36:2715–23. Support for the study should be given credit as follows. Funding for part of this study was obtained from the DOD (U.S. Department of Defense) Congressionally Directed Medical Research Program (CDMRP) grant PR064251. We regret the error.