1. Department of Neuropsychology, Sanford Health, Bismarck, North Dakota, USA.
2. Aptiva Health Concussion Program, Louisville, Kentucky, USA.
3. Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
4. UPMC Sports Medicine Concussion Program, Pittsburgh, Pennsylvania, USA.
5. Department of Physical Medicine and Rehabilitation, Spaulding Rehabilitation Hospital, Charlestown, Massachusetts, USA.
6. Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, Massachusetts, USA.
7. Northside Hospital Concussion Institute, Duluth, Georgia, USA.
8. Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.