1. Department of Orthopaedic Surgery, University of Ioannina, Ioannina, Greece
2. Department of Mechanical Engineering, Aristotle University of Thessaloniki, Thessaloniki, Greece
3. Department of Mechanical Engineering and Aeronautics, University of Patras, Patras, Greece
4. Department of Materials Science and Engineering, University of Ioannina, Ioannina, Greece