1. Department of Chemistry, Bioscience and Environmental Engineering University of Stavanger Stavanger Norway
2. Department of Biomedicine University of Bergen Bergen Norway
3. Department of Oncology and Medical Physics Haukeland University Hospital Bergen Norway
4. Department of Gastrointestinal Surgery Stavanger University Hospital Stavanger Norway
5. Department of Clinical medicine University of Bergen Bergen Norway
6. Gastrointestinal Translational Research Group Stavanger University Hospital Stavanger Norway