1. Department of Health Care Policy, Harvard Medical School, Boston, Massachusetts
2. Center for Bioethics and Humanities, University of Colorado Denver Anschutz Medical Campus, Aurora
3. Division of General Internal Medicine, Department of Medicine, University of Colorado School of Medicine, Aurora
4. Department of Pediatrics, University of Washington, Seattle
5. Center for Child Health, Behavior and Development, Seattle Children’s Research Institute, Seattle, Washington
6. Sports Concussion Clinic, Department of Sports Medicine, Boston Children’s Hospital, Boston, Massachusetts