Wolfe F, Michaud K, Wallenstein G. Scale characteristics and mapping accuracy of the US EQ-5D, UK EQ-5D, and SF-6D in patients with rheumatoid arthritis. J Rheumatol 2010;37:1615-25. Kaleb Michaud received partial funding from the Arthritis Foundation’s New Investigator Award and NIH ARRA grant 1RC1AR058601-01. We regret the error.