1. Harvard Medical School, Boston, MA, USA
2. Spaulding Rehabilitation Hospital, Boston, MA, USA
3. MassGeneral Hospital for Children Sports Concussion Program, Boston, USA
4. Red Sox Foundation and Massachusetts General Hospital Home Base Program, Boston, USA
5. Alberta Children’s Hospital, Calgary, Canada
6. University of Calgary, Alberta, Canada
7. Colby College, Waterville, ME, USA
8. Massachusetts General Hospital, Boston, USA