1. The Micheli Center for Sports Injury Prevention, Waltham, MA, USA
2. Division of Sports Medicine, Department of Orthopedics, Boston Children’s Hospital, Boston, MA, USA
3. Division of Community Pediatric and Adolescent Medicine, Department of Pediatric and Adolescent Medicine, Mayo Clinic, Rochester, MN, USA
4. Department of Pediatric Sports Medicine, Scottish Rite for Children, Dallas, TX, USA
5. Department of Orthopaedic Surgery, University of Texas Southwestern, Dallas, TX, USA
6. Harvard Medical School, Boston, MA, USA
7. Faculty of Sport Sciences, Waseda University, Tokyo, Japan