1. University of Washington, Department of Pediatrics, Seattle, WA, USA
2. Seattle Children’s Research Institute, Center for Child Health, Behavior and Development, Seattle, WA, USA
3. National Collegiate Athletic Association, Indianapolis, IN, USA
4. Harvard University Interfaculty Initiative in Health Policy, Cambridge, MA, USA
5. Boston Children’s Hospital, Micheli Center for Sports Injury Prevention, Boston, MA, USA