1. Department of Public Health Education, University of North Carolina at Greensboro, Greensboro, North Carolina
2. Department of Epidemiology & Orthopedics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
3. Injury Prevention Research Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
4. Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina