1. Department of Neurological Surgery, Vanderbilt Sports Concussion Center, Vanderbilt University Medical Center, Nashville, Tennessee;
2. Vanderbilt University School of Medicine, Nashville, Tennessee;
3. University of Tennessee Health Science Center, College of Medicine, Memphis, Tennessee;
4. Harvard Medical School, Boston, Massachusetts;
5. University of New England, College of Osteopathic Medicine, Biddeford, Maine;
6. Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, Massachusetts;
7. Mass General for Children Sports Concussion Program, Boston, Massachusetts; and
8. Department of Physical Medicine and Rehabilitation, Spaulding Rehabilitation Hospital and the Schoen Adams Research Institute at Spaulding Rehabilitation, Charlestown, Massachusetts