1. Department of Clinical Neuroscience and Rehabilitation, Institute of Neuroscience and Physiology, Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
2. BOA Registry Registercentrum Västra Götaland Gothenburg Sweden
3. Department of Orthopaedics, Institute of Clinical Sciences, Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
4. Swedish Hip Arthroplasty Register Registercentrum Västra Götaland Gothenburg Sweden
5. Department of Education, Communication and Learning University of Gothenburg Gothenburg Sweden
6. Department of Orthopaedics, Clinical Sciences Lund Lund University, Skåne University Hospital Lund Sweden