1. Department of Orthopaedic Surgery, Joe DiMaggio Children’s Hospital, Hollywood, FL, USA
2. The Micheli Center for Sports Injury Prevention, Waltham, MA, USA
3. Division of Sports Medicine, Department of Orthopaedics, Boston Children’s Hospital, Boston, MA, USA
4. Department of Orthopaedic Surgery, Harvard Medical School, Boston, MA, USA
5. Sports Medicine, Rehabilitation, and Concussion Center, Tucson, AZ, USA