1. Gastroenterology Unit, Department of Internal Medicine Stavanger University Hospital Stavanger Norway
2. Department of Clinical Science, Faculty of Medicine University of Bergen Bergen Norway
3. Clinical Immunology Unit, Department of Internal Medicine Stavanger University Hospital Stavanger Norway
4. Department of Mathematics and Physics University of Stavanger Stavanger Norway
5. Research Department Stavanger University Hospital Stavanger Norway
6. Department of Transplantation Medicine Oslo University Hospital Rikshospitalet Oslo Norway
7. Department of Medical Biochemistry Oslo University Hospital Radiumhospitalet Oslo Norway
8. KG Jebsen Celiac Disease Research Centre University of Oslo Oslo, Norway