1. University of Michigan, Ann Arbor, Michigan.
2. University of Pittsburgh, Pittsburgh, Pennsylvania.
3. Baylor College of Medicine and the Michael E. DeBakey VA Medical Center, Houston, Texas.
4. University of Calgary, Calgary, Alberta, Canada.
5. University of Utah School of Medicine, Salt Lake City, Utah.
6. Concussion Center at Emerson Hospital, Concord, Massachusetts.
7. Swiss Concussion Center, University of Zurich, Zurich, Switzerland.
8. University of Sheffield, Sheffield, United Kingdom.
9. Montreal Children's Hospital, McGill University Health Center, Montréal, Québec, Canada.
10. Children's National Health System, Washington, DC.
11. UCLA Brain Injury Research Center, Steve Tisch BrainSPORT Program, University of California, Los Angeles, California.
12. Centre for Neuro Skills, Encino, California.
13. SUNY Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, New York.
14. Albert Einstein College of Medicine and Montefiore Medical Center, Bronx, New York.
15. The Mind Research Network, University of New Mexico, Albuquerque, New Mexico.
16. Indiana University School of Medicine, Indianapolis, Indiana.
17. Medical College of Wisconsin, Milwaukee, Wisconsin.
18. The Research Institute at Nationwide Children's Hospital, Columbus, Ohio.
19. Princeton University, Princeton, New Jersey.
20. San Camillo-Forlanini Hospital, Rome, Italy.
21. Kennedy Krieger Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland.
22. Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, Maryland.
23. The International Concussion and Head Injury Research Foundation, London, United Kingdom.
24. Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada.
25. The Emmes Corporation, Rockville, Maryland.
26. National Institute of Neurological Disorders and Stroke (NINDS) Bethesda, Maryland.