1. School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, University Campus, 55131 Thessaloniki, Greece
2. Department of Orthopaedics, “Papageorgiou” General Hospital, Medical School, Aristotle University of Thessaloniki, 56403 Thessaloniki, Greece
3. Department of Educational and Social Policy, University of Macedonia, Egnatia Street 156, 54636 Thessaloniki, Greece