They found higher levels of IL-1β, IL-4, IL-17A, IL-17F, IL-21, IL-22, IL-31, IFN-γ, sCD40L, and TNF-α, with a significant difference for IL-17F, in BD-recurrent uveitis patients respect to the BD-remitted uveitis group, before drug infusion. This evidence concerns the gene IL21 and Behcet disease.