1. Hand Surgery and Microsurgery Unit – Pediatric Orthopedic and Traumatology Unit – Azienda Ospedaliera SS Antonio e Biagio e Cesare Arrigo, Alessandria, Italy
2. Pediatric Orthopedic and Traumatology Unit – IRCCS Rizzoli, Bologna, Italy
3. Hand and Upper Limb Service, Department of Plastic Surgery – Birmingham Womes’s and Children’s Hospital, Birmingham, UK
4. Pediatric Hand Unit – Hospital Infantil Universitario Nino Jesus, Madrid, Spain
5. Department of Pediatric Orthopedic Surgery – Karolinska University Hospital, Stockholm, Sweden
6. International Pediatric Hand Surgery and Microsurgery Institute – Barcelona Childrens Hospital HM Nens – HM Hospitales, Barcelona, Spain
7. Pediatric Orthopedic Division – Geneva Children’s Hospital, Geneve, Switzerland
8. Orthopedic Hospital Speising, Department of Pediatric Orthopedics and Foot and Ankle Surgery, Vienna, Austria