1 Sports Concussion Research Group, Department of Kinesiology, Texas Christian University, Fort Worth, TX jonathan.oliver@tcu.edu Division of Health and Human Performance, George Mason University, Manassas, VA Sports Concussion Research Group, Department of Kinesiology, Texas Christian University, Fort Worth, TX Department of Sport Medicine, Texas Christian University, Fort Worth, TX Department of Sport Medicine, John Peter Smith Hospital, Fort Worth, TX Sports Concussion Research Group, Department of Kinesiology, Texas Christian University, Fort Worth, TX Department of Sport Medicine, Texas Christian University, Fort Worth, TX State Key Laboratory of Medical Neurobiology and Institute of Brain Science, Fudan University, China Department of Internal Medicine, University of South Dakota, Sioux Falls, SD Clinical Neurochemistry Laboratory, Institute Of Neuroscience and Physiology, the Sahlgrenska Academy at University of Gothenburg, Mölndal, Sweden Department of Molecular Neuroscience, UCL Institute of Neurology, Queen Square, London, UK.