1. School of Sport Sciences, Waseda University, Tokyo, Japan
2. The Micheli Center for Sports Injury Prevention, Waltham, MA, USA
3. Centre for Pediatric Emergencies, Brossard, QC, Canada
4. Division of Sports Medicine, Department of Orthopedics, Boston Children’s Hospital, Boston, MA, USA
5. Department of Orthopaedic Surgery, Harvard Medical School, Boston, MA, USA