1. 1Hormone Laboratory, Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
2. 2Institute of Clinical Medicine, University of Oslo, Oslo, Norway
3. 3Division of Medicine, Akershus University Hospital, Lørenskog, Norway
4. 4National Centre for Ultrasound in Gastroenterology, Haukeland University Hospital, Bergen, Norway
5. 5Department of Clinical Medicine, University of Bergen, Bergen, Norway
6. 6Department of Clinical Science, University of Bergen, Bergen, Norway
7. 7K.G. Jebsen-Center for Autoimmune Diseases, University of Bergen, Bergen, Norway
8. 8Department of Medicine, Haukeland University Hospital, Bergen, Norway