1. The Micheli Center for Sports Injury Prevention, Waltham, MA 02453, USA
2. Faculty of Sport Sciences, Waseda University, Tokyo 202-0021, Japan
3. Division of Sports Medicine, Department of Orthopaedics, Boston Children’s Hospital, Boston, MA 02115, USA
4. Harvard Medical School, Boston, MA 02115, USA
5. Division of Emergency Medicine, Department of Medicine, Boston Children’s Hospital, Boston, MA 02115, USA
6. Biostatistics and Research Design Center, Institutional Centers for Clinical and Translational Research, Boston Children’s Hospital, Boston, MA 02115, USA
7. Division of Hematology and Oncology, Boston Children’s Hospital, Boston, MA 02115, USA
8. The College of New Jersey, Ewing, NJ 08628, USA
9. Emory Sports Performance and Research Center (SPARC), Flowery Branch, GA 30542, USA
10. Emory Sports Medicine Center, Atlanta, GA 30329, USA
11. Department of Orthopaedics, Emory University School of Medicine, Atlanta, GA 30307, USA