1 Murdoch Children's Research Institute, Parkville, Victoria, Australia gavin.davis@me.com.
2 Cabrini Health, Malvern, Victoria, Australia.
3 Psychology, University of Missouri Kansas City, Kansas City, Missouri, USA.
4 Psychological and Neurobehavioral Associates, Inc, Port Matilda, Pennsylvania, USA.
5 Physiotherapy Department, University Hospitals Dorset NHS Foundation Trust, Poole, UK.
6 The FA Centre for Para Football Research, The Football Association, Burton-Upon-Trent, UK.
7 Child Neuropsychology, Murdoch Childrens Research Institute, Parkville, Victoria, Australia.
8 Psychology, University of Melbourne, Parkville, Victoria, Australia.
9 Department of Physical Medicine and Rehabilitation, Spaulding Rehabilitation/Harvard Medical School, Boston, Massachusetts, USA.
10 Neurosurgery/ Neurology, Medical College of Wisconsin, Milwaukee, Wisconsin, USA.
11 Michigan Concussion Center, University of Michigan, Ann Arbor, Michigan, USA.
12 Biomedical and Health Informatics, University of Missouri - Kansas City, Kansas City, Missouri, USA.
13 Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada.
14 Children's National Health System, Washington, District of Columbia, USA.
15 Neurosurgery, UCLA Steve Tisch BrainSPORT Program, Los Angeles, California, USA.
16 Pediatrics / Pediatric Neurology, Mattel Children's Hospital UCLA, Los Angeles, California, USA.
17 Matthew Gfeller Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
18 Family Medicine, University of Washington, Seattle, Washington, USA.
19 Departments of Rehabilitation Medicine, Orthopaedics and Sports Medicine and Neurological Surgery, University of Washington, Seattle, Washington, USA.
20 Florey Institute of Neuroscience and Mental Health - Austin Campus, Heidelberg, Victoria, Australia.
21 La Trobe Sport and Exercise Medicine Research Centre, Melbourne, Victoria, Australia.
22 Orthopedics and Sports Medicine, Pediatrics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.
23 Neurosurgery, Medical College of Wisconsin, Milwaukee, Wisconsin, USA.
24 Sports Medicine, Children's Hospital Boston, Boston, Massachusetts, USA.
25 Emergency Medicine, Children's Hospital Boston, Boston, Massachusetts, USA.
26 Medicine, University of Alberta, Edmonton, Alberta, Canada.
27 Wits Sport and Health (WiSH), School of Clinical Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg-Braamfontein, South Africa.
28 The Department of Pediatrics, McMaster University, Hamilton, Ontario, Canada.
29 Major League Soccer, New York, New York, USA.
30 Sport Injury Prevention Research Centre, Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada.
31 Department of Athletic Training and School of Osteopathic Medicine in Arizona, A.T. Still University, Mesa, Arizona, USA.
32 Department of Physical Medicine and Rehabilitation, Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA.
33 Psychology, University of Calgary, Calgary, Alberta, Canada.
34 Pediatrics, Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada.