1. Department of Orthopaedics Sahlgrenska University Hospital Gothenburg Sweden
2. Department of Orthopaedics Institute of Clinical Sciences Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
3. Department of Orthopaedics Sahlgrenska University Hospital 43180 Mölndal Sweden
4. Sahlgrenska Sports Medicine Center Gothenburg Sweden
5. Department of Health and Rehabilitation Institute of Neuroscience and Physiology Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
6. Sportrehab Sports Medicine Clinic Gothenburg Sweden