1. Department of Neurosurgery, University of North Carolina at Chapel Hill, Chapel Hill, USA
2. Matthew Gfeller Sport-Related TBI Research Center, Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, USA
3. Department of Neurosurgery, The GW School of Medicine and Health Sciences, Washington, DC, USA
4. Human Movement Science Curriculum, University of North Carolina at Chapel Hill, Chapel Hill, NC