1. Orthopaedic Department, “Ippokrateio” Hospital of Thessaloniki, 54643 Thessaloniki, Greece
2. Paediatric Department, General Hospital of Pella—Hospital Unit of Edessa, 58200 Edessa, Greece
3. Orthopaedic Department, General Hospital of Pella—Hospital Unit of Edessa, 58200 Edessa, Greece