1. Department of Gastroenterology and Hepatology, St Olav’s Hospital, Trondheim, Norway;
2. Department of Cancer Research and Molecular Medicine, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway;
3. Department of Pathology and Medical Genetics, St Olav’s Hospital, Trondheim, Norway;
4. Department of Laboratory Medicine, Children and Woman Health, NTNU, Trondheim, Norway