Lee J-H, Cho M-L, Kim J-I, et al. Interleukin 17 (IL-17) increases the expression of Toll-like receptor-2, 4, and 9 by increasing IL-1 and IL-6 production in autoimmune arthritis. J Rheumatol 2009;36:684–92. The correct name of the seventh author is Sun Ryu, PhD. We regret the error.