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