Affiliation: | 2. Department of Gastrointestinal Surgery, Stavanger University Hospital, P.O. Box 8100, 4068 Stavanger, Norway;3. Department of Clinical Medicine, University of Bergen, Jonas Lies veg 87, 5021 Bergen, Norway;4. Department of Pathology, Stavanger University Hospital, P.O. Box 8100, 4068 Stavanger, Norway;5. Gastrointestinal Translational Research Unit, Laboratory for Molecular Biology, Stavanger University Hospital, P.O. Box 8100, 4068 Stavanger, Norway |