1. K. G. Jebsen Centre for Coeliac Disease Research University of Oslo Oslo Norway
2. Department of Immunology University of Oslo and Oslo University Hospital‐Rikshospitalet Oslo Norway
3. Institute of Clinical Medicine University of Oslo Oslo Norway
4. Department of Gastroenterology Akershus University Hospital Lørenskog Norway
5. Department of Gastroenterology Oslo University Hospital‐Rikshospitalet Oslo Norway