1. Department of Pediatrics, Harborview Injury Prevention and Research Center, University of Washington, Seattle
2. Department of Epidemiology, Harborview Injury Prevention and Research Center, University of Washington, Seattle
3. Center for Child Health, Behavior and Development, Seattle Children’s Research Institute, Seattle, Washington
4. Harborview Injury Prevention and Research Center, University of Washington, Seattle
5. Department of Neurological Surgery, The Sports Institute, UW Medicine and Seattle Children’s Research Institute, Seattle, Washington
6. Faculty of Kinesiology and Community Health Sciences and Pediatrics, Sport Injury Prevention Research Centre, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
7. Department of Pediatrics, George Washington University School of Medicine, Washington, DC
8. Department of Psychiatry and Behavioral Sciences, George Washington University School of Medicine, Washington, DC
9. Children’s National Health System, Washington, DC
10. Steve Tisch BrainSPORT Program, University of California, Los Angeles
11. Department of Pediatrics, Mattel Children’s Hospital and David Geffen School of Medicine, Los Angeles, California
12. Department of Neurosurgery, Mattel Children’s Hospital and David Geffen School of Medicine, Los Angeles, California
13. Department of Rehabilitation Medicine, Orthopedics, and Sports Medicine, The Sports Institute, UW Medicine and Seattle Children’s Research Institute, Seattle, Washington
14. Department of Health and Human Physiology, University of Iowa, Iowa City
15. Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
16. The Institute for Sports Medicine, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, Illinois
17. Athletic Training Programs and Research, School of Osteopathic Medicine, A. T. Stills University, Mesa, Arizona
18. Department of Pediatrics, Harvard Medical School, Boston, Massachusetts
19. Department of Orthopedics, Harvard Medical School, Boston, Massachusetts
20. Micheli Center for Sports Injury Prevention, Waltham, Massachusetts
21. Brain Injury Center, Boston Children’s Hospital, Boston, Massachusetts
22. Department of Health Sciences, Wits Institute for Sport and Health, University of Witwatersrand, Johannesburg, South Africa
23. Waterfall Sports Orthopaedic Surgery, Johannesburg, South Africa