1. Division of Community Medicine, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden;
2. HELIX Competence Centre, Linköping University, Linköping, Sweden;
3. Pain and Rehabilitation Centre, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden;
4. Department of Social and Welfare Studies, Linköping University, Norrköping, Sweden