1. First Department in Orthopaedics and Trauma Surgery, Georgios Papanikolaou Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
2. Department in Orthopaedics and Trauma Surgery, Agios Pavlos General Hospital, Thessaloniki, Greece
3. Second Department in Orthopaedics and Trauma Surgery, G. Gennimatas General Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece