1. 1 Applied Biomechanics Laboratory, Department of Kinesiology, University of Texas at San Antonio, San Antonio TX
2. 2 Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, NC
3. 3 Rockefeller Neuroscience Institute, West Virginia University, Morgantown, WV
4. 4 Matthew Gfeller Sport-Related Traumatic Brain Injury Research Center, University of North Carolina at Chapel Hill, Chapel Hill, NC
5. 5 Injury Prevention Research Center, University of North Carolina at Chapel Hill, Carrboro, NC
6. 6 School of Health Professions, University of Southern Mississippi, Hattiesburg, MS