IL6 and brain injury: A study from Visser et al. [32] highlighted a different temporal profile of IL-6 in sports-related concussion (SRC) and military concussion versus the general unselected population with mTBI; in athletes and military personnel, there was an acute elevation (<8 h) followed by a return to baseline within 48 h, whereas the general unselected population showed alterations lasting up to six months after injury.