1. Center of Orthopaedics and Traumatology, University Hospital Brandenburg/Havel Brandenburg Medical School Theodor Fontane Brandenburg a.d.H. Germany
2. Faculty of Health Sciences Brandenburg Brandenburg Medical School Theodor Fontane Brandenburg a.d.H. Germany
3. Department of Orthopaedics, Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
4. Faculty of Health Care, Therapeutic Sciences Niederrhein University of Applied Sciences Krefeld Germany
5. Ergonomics and Biomedical Monitoring Laboratory Wroclaw Medical University Wroclaw Poland