1. Department of Pathology, Stavanger University Hospital, 4011 Stavanger, Norway
2. Department of Research, Stavanger University Hospital, 4011 Stavanger, Norway
3. Department of Pathology, Haukeland University Hospital, 5053 Bergen, Norway
4. Gade Laboratory for Pathology, Department of Clinical Medicine, University of Bergen, 5020 Bergen, Norway
5. Department of Chemistry, Bioscience and Environmental Technology, University of Stavanger, 4021 Stavanger, Norway