In children with mTBI at 2 weeks, IL-17A, IL-8, IL-10 and TNF-α levels remained significantly decreased (p = 0.009, p < 0.0001, p = 0.0006, p < 0.0001, respectively), while IL-6 returned to baseline (Figs. 1 and 2). This evidence concerns the gene CXCL8 and concussion.