1. 1Division of Sports Medicine, Department of Orthopedics, Boston Children’s Hospital, Boston, MA, USA
2. 2Department of Orthopedics, Boston Children’s Hospital, Harvard Medical School, Boston, MA, USA
3. 3Division of Emergency Medicine, Department of Medicine, Boston Children’s Hospital, Boston, MA, USA
4. 4Harvard Medical School, Boston, MA, USA
5. 5The Micheli Center for Sports Injury Prevention, Waltham, MA, USA