1. Department of Physiotherapy, NU Hospital Group, Trollhättan/Uddevalla, Sweden
2. Institute of Clinical Science, Department of Orthopaedics, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
3. Department of Research and Development, NU Hospital Group, Trollhättan/Uddevalla, Sweden
4. Department of Health Sciences, University West, Trollhättan, Sweden