Bonroy C, Smith V, Deschepper E, De Keyser F, Devreese K. Specific antinuclear antibody level changes after B cell depletion therapy in systemic sclerosis are associated with improvement of skin thickening (letter). J Rheumatol 2016;43:247–9. The author byline should have included the following statement: Carolien Bonroy and Vanessa Smith contributed equally to this work and are co-first authors. We regret the error.