1. The General Practice and Care Coordination Research Group, Stavanger University Hospital, Stavanger, Norway
2. Department of Gastroenterology and Hepatology, Odense University Hospital, Odense, Denmark
3. Institute of Clinical Research, University of Southern Denmark, Odense, Denmark
4. Centre for Age-Related Medicine (SESAM), Stavanger University Hospital, Stavanger, Norway
5. Faculty of Health Sciences, University of Stavanger, Stavanger, Norway
6. Department of global public health and primary care, University of Bergen, Bergen, Norway