1. Neurological Institute, Cleveland Clinic, Las Vegas, NV, USA
2. Department of Neurology, University of Washington, Seattle, DC, USA
3. Yale University, New Haven, CT, USA
4. Center for Sports Neurology, Cedars-Sinai Kerlan Jobe Institute, Los Angeles, CA, USA
5. Concussion and Sports Medicine Center, Banner Health, Phoenix, AZ, USA
6. School of Public Health, UNLV, Las Vegas, NV, USA
7. Department of Neurology, Norton Healthcare, Louisville, KY, USA