1. Department of Gastroenterology, University Hospital Linköping, County Council of Östergötland, Linköping, Sweden
2. Division of Inflammation and Infection, Department of Biomedical and Clinical Sciences (BKV), Linköping University, Linköping, Sweden
3. Pain and Rehabilitation Centre and Department of Health, Medicine and Caring Sciences (HMV), Linköping University, Linköping, Sweden
4. School of Psychological Sciences, Macquarie University, North Ryde, NSW, Australia
5. Department of Health, Medicine and Caring Sciences (HMV), Division of Society and Health/Public Health, Linköping University, Linköping, Sweden
6. Department of Health, Medicine and Caring Sciences (HMV), Division of Diagnostics and Specialist Medicine, Linköping University, Linköping, Sweden