CCL2 and concussion: Serum levels of CCL2, IL-1β, and IL-6 in acute phase were higher in mTBI patients than in controls (all P < 0.001) after Bonferroni correction with an adjusted P < 0.0056 (0.05/9 for nine cytokines; Figure 1 and Supplementary Table S2; given that the values were not normally distributed, thus presented as median and interquartile ranges).