1 Psychology, University of Missouri Kansas City, Kansas City, Missouri, USA rechemendia@comcast.net.
2 Psychological and Neurobehavioral Associates, Inc, Miami, Florida, USA.
3 Neurosurgery/ Neurology, Medical College of Wisconsin, Milwaukee, Wisconsin, USA.
4 Michigan Concussion Center, University of Michigan, Ann Arbor, Michigan, USA.
5 Murdoch Children's Research Institute, Parkville, Victoria, Australia.
6 Cabrini Health, Malvern, Victoria, Australia.
7 Neurosurgery, UCLA Steve Tisch BrainSPORT Program, Los Angeles, California, USA.
8 Pediatrics/Pediatric Neurology, Mattel Children's Hospital UCLA, Los Angeles, California, USA.
9 Sports Medicine Research laboratory, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
10 Family Medicine, University of Washington, Seattle, Washington, USA.
11 Rehabilitation Medicine, University of Washington, Seattle, Washington, USA.
12 Orthopedics, Sports Medicine Center, Children's Hospital Colorado, University of Colorado, Aurora, Colorado, USA.
13 Department of Pediatrics, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.
14 Neurosurgery, Medical College of Wisconsin, Milwaukee, Wisconsin, USA.
15 Medicine, University of Alberta, Edmonton, Alberta, Canada.
16 Wits Sport and Health (WiSH), School of Clinical Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg-Braamfontein, South Africa.
17 Chief Medical Officer, Major League Soccer, New York, New York, USA.
18 Princeton, New Jersey, USA.
19 Department of Physical Medicine and Rehabilitation, Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA.
20 Sport Injury Prevention Research Centre, Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada.
21 Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada.
22 Biomedical and Health Informatics, University of Missouri - Kansas City, Kansas City, Missouri, USA.