1. Department of Orthopedic Surgery, Hospital Universitario de Navarra, Pamplona, Spain
2. Department of Orthopedic Surgery, San Pietro Clinic, Ponte San Pietro, Italy
3. Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA
4. Transalpine Center of Pediatric Sports Medicine and Surgery, University of Milano-Bicocca—Hospital Couple Enfant, Monza, Italy
5. Sports Medicine Division, Boston Children’s Hospital, Boston, MA, USA
6. Harvard Medical School, Boston, MA, USA