1 Department of Gastroenterology, Oslo University Hospital—Ullevål, Oslo, Norway2 Centre for Immune Regulation and Department of Immunology, Oslo University Hospital—Rikshospitalet, Oslo, Norway3 Research Institute of Internal Medicine, Oslo University Hospital—Rikshospitalet, Oslo, Norway4 Centre for Immune Regulation and Department of Pathology, Oslo University Hospital—Rikshospitalet and University of Oslo, Oslo, Norway5 Centre for Immune Regulation and Department of Immunology, University of Oslo, Oslo, Norway6 Department of Medicine, Oslo University Hospital—Rikshospitalet, Oslo, Norway