1. Division of Nursing Science, Department of Health, Medicine and Caring Sciences Linköping University Linköping Sweden
2. Department of Surgery Linköping University Hospital Linköping Sweden
3. Department of Surgery Regional Hospital of Eksjö Eksjö Sweden
4. Unit for Public Health and Statistics County Council of Östergötland, Linköping University Linköping Sweden
5. Department of Surgery in Linköping, Department of Biomedical and Clinical Sciences Linköping University Linköping Sweden