1. Lund University, Faculty of Medicine, Department of Clinical Sciences Lund, Orthopaedics, Lund 22185, Sweden.
2. University Hospital Carl Gustav Carus at Technische Universität Dresden, University Center of Orthopedic, Trauma and Plastic Surgery, Dresden 01307, Germany.
3. Lund University, Department of Biomedical Engineering, Lund 22100, Sweden.