1. Department of Research, Stavanger University Hospital, Stavanger, Norway
2. Department of Gastrointestinal Surgery, Stavanger University Hospital, Stavanger, Norway
3. Department of Quality and Health Technology, Faculty of Health Sciences, University of Stavanger, Stavanger, Norway
4. Department of Clinical Medicine, University of Bergen, Bergen, Norway
5. Department of Caring and Ethics, Faculty of Health Sciences, University of Stavanger, Stavanger, Norway