Erratum to: Detection of gene expression signatures related to underlying disease and treatment in rheumatoid arthritis patients

In the last paragraph of our ‘‘Results’’, we stated that ‘‘The only significant difference between the groups was the proportion of CD4? T-cells in the lymphocyte population in tocilizumab-treated individuals versus RA patients with no biologics treatment (38.6 ± 7.8 % vs. 34 ± 11.4, respectively; p \ 0.05).’’ The specific percentage values are incorrect and should be ‘‘...(47.0 ± 6.5 % vs. 34.0 ± 11.4 %,...’’.