1. Department of Orthopaedics, Evangelismos General Hospital of Athens, Greece
2. Orthopaedic Department, Red Cross Hospital of Athens, Greece
3. 1st Department of Orthopaedics, National and Kapodistrian University of Athens, Athens, Greece
4. 2nd Department of Orthopaedics, National and Kapodistrian University of Athens, Athens, Greece
5. Department of Anesthesiology, Children Hospital “Agia Sofia”, Athens, Greece