1. Michigan Concussion Center, University of Michigan, Ann Arbor, MI
2. Department of Health, Exercise and Sports Sciences, University of New Mexico, Albuquerque, NM
3. Departments of Neurosurgery and Neurology, Medical College of Wisconsin, Milwaukee, WI
4. School of Nursing, University of Wisconsin-Madison, Madison, WI
5. Datalys Center for Sports Injury Research and Prevention, Indianapolis, IN
6. Department of Athletics, University of Michigan, Ann Arbor, MI
7. Department of Physical Medicine and Rehabilitation at the Uniformed Services University of the Health Sciences, Bethesda, MD
8. Department of Psychiatry, Indiana University School of Medicine, Indianapolis, IN
9. Perelman School of Medicine at the University of Pennsylvania, University of Pennsylvania, Philadelphia, PA