1. Department of Interdisciplinary Health Sciences, Arizona School of Health Sciences, A.T. Still University, Mesa, AZ 85206, USA
2. Walter Reed Army Institute of Research, Silver Spring, MD 20910, USA
3. United States Air Force Academy, USAF Academy, CO 80840, USA
4. Matthew Gfeller Sport-Related TBI Research Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
5. UGA Concussion Research Laboratory, Department of Kinesiology, University of Georgia, Athens, GA 30602, USA