1. Department of Immunology Oslo University Hospital‐Rikshospitalet Oslo 0372 Norway
2. KG Jebsen Coeliac Disease Research Centre Institute of Clinical Medicine University of Oslo Oslo 0372 Norway
3. Celiac Disease Research Centre Faculty of Medicine and Health Technology Tampere University Tampere 33520 Finland
4. Department of Dermatology Tampere University Hospital Tampere 33520 Finland
5. Department of Gastroenterology Oslo University Hospital‐Rikshospitalet Oslo 0372 Norway
6. Department of Pathology University of Oslo and Institute of Clinical Medicine Oslo University Hospital‐Rikshospitalet Oslo 0372 Norway
7. Department of Gastroenterology Akershus University Hospital Lørenskog 1478 Norway