1 Wits Sport and Health (WiSH), School of Clinical Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg-Braamfontein, South Africa jpat@mweb.co.za.
2 Department of Radiology, University of Calgary, Calgary, Alberta, Canada.
3 Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada.
4 Department of Padiatrics, McMaster University, Hamilton, Ontario, Canada.
5 Murdoch Children's Research Institute, Parkville, Victoria, Australia.
6 Psychology, University of Missouri Kansas City, Kansas City, Missouri, USA.
7 University Orthopedics Concussion Care Clinic, State College Area School District, State College, Stage College, Pennsylvania, USA.
8 Rehabilitation, Laval University, Quebec City, Quebec, Canada.
9 School of Health and Related Research, University of Sheffield, Sheffield, UK.
10 Departments of Rehabilitation Medicine, Orthopaedics and Sports Medicine and Neurological Surgery, University of Washington, Seattle, Washington, USA.
11 Department of Family Medicine, University of Washington, Seattle, Washington, USA.
12 Department of Kinesiology, University of Calgary, Calgary, Alberta, Canada.
13 Institute for Sport Exercise and Health, University Collage Hospital London, London, UK.
14 Florey Institute of Neuroscience and Mental Health - Austin Campus, Heidelberg, Victoria, Australia.
15 La Trobe Sport and Exercise Medicine Research Centre, Melbourne, Victoria, Australia.
16 Neurosurgery, Medical College of Wisconsin, Milwaukee, Wisconsin, USA.
17 Sports Medicine, Children's Hospital Boston, Boston, Massachusetts, USA.
18 Emergency Medicine, Children's Hospital Boston, Boston, Massachusetts, USA.
19 Neurotrauma and Ophthalmology Research Group, University of Birmingham, Birmingham, UK.
20 Health Education England West Midlands, Edgbaston, UK.
21 Libraries, University of Victoria, Victoria, British Columbia, Canada.
22 Chief Medical Officer, Major League Soccer, New York, New York, USA.
23 Sport Injury Prevention Research Centre, University of Calgary, Calgary, Alberta, Canada.
24 International Concussion and Head Injury Research Foundation, Tottenham Court Road, London, UK.
25 University College London, London, UK.
26 University of Calgary Faculty of Kinesiology, Calgary, Alberta, Canada.
27 Department of Sport and Exercise Medicine, Faculty of Health Sciences, University of Brighton, Brighton, UK.
28 Medical Committee, International Paralympic Committee, Bonn, Germany.
29 Psychology, University of Calgary, Calgary, Alberta, Canada.
30 Sport Injury Prevention Research Centre, Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada.