1. Sports Medicine Fellowship, Department of Community Health and Family Medicine, University of Florida, Gainesville, Florida;
2. Department of Neurology, University of Florida, Gainesville, Florida ;
3. Department of Emergency Medicine, University of Florida, Gainesville, Florida ;
4. Department of Orthopaedics, University of Florida, Gainesville, Florida;
5. James H. Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee ;
6. School of Medicine, Vanderbilt University, Nashville, Tennessee;
7. Vanderbilt Sports Concussion Center, Department of Neurological Surgery, Vanderbilt University Medical Center, Nashville, Tennessee;
8. Department of Emergency Medicine, Vanderbilt University, Nashville, Tennessee ; and
9. Department of Orthopaedic Surgery, Vanderbilt University, Nashville, Tennessee.