1. Department of Orthopedics and Sports Medicine, State University of New York at Buffalo, Buffalo, New York, USA.
2. Department of Psychiatry, State University of New York at Buffalo, Buffalo, New York, USA.
3. Department of Rehabilitation Sciences, State University of New York at Buffalo, Buffalo, New York, USA.
4. Christiana Care, Medicine-Pediatrics Residency Program, Newark, Delaware, USA.
5. Sports Medicine and Performance Center, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.
6. Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
7. University of Michigan Injury Prevention Center, University of Michigan, Ann Arbor, Michigan, USA.
8. Brain Injury Center, Boston Children's Hospital, Boston, Massachusetts, USA.
9. Division of Emergency Medicine, Boston, Massachusetts, USA.