1. Department of Pediatric Orthopedics and Foot and Ankle Surgery, Orthopedic Hospital Speising, Vienna, Austria
2. Servicio de Cirugía Ortopédica y Traumatología Infantil, Hospital Infantil Universitario Niño Jesús, Madrid, Spain
3. Pediatric Hand and Upper Extremity Center, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
4. The Sidney Kimmel Medical College of Thomas Jefferson University, Philadelphia, PA, USA
5. Center for Medical Statistics, Informatics and Intelligent Systems; Medical University of Vienna, Austria
6. International Pediatric Hand Surgery and Microsurgery Institute, Barcelona University Childrens Hospital HM Nens, Barcelona, Spain
7. Unidad UCA Mikel Sanchez, Vithas San José, Vitoria, Spain
8. Shriners Hospitals for Children, Philadelphia Hand to Shoulder Center, Philadelphia, PA, USA