1. Department of Exercise and Sport Science, University of North Carolina, Chapel Hill, North Carolina.
2. Matthew Gfeller Sport-Related Traumatic Brain Injury Research Center, University of North Carolina, Chapel Hill, North Carolina.
3. Human Movement Science Curriculum, University of North Carolina, Chapel Hill, North Carolina.
4. Department of Health and Human Performance, Texas State University, San Marcos, Texas.
5. Department of Epidemiology, Colorado School of Public Health, Aurora, Colorado.
6. Department of Kinesiology & Applied Physiology, University of Delaware, Newark, Deleware.