1. Department of Medical Biology, University of Tromsø, The Arctic University of Norway, N-9037 Tromso, Norway
2. Department of Clinical Pathology, University Hospital of North Norway, N-9038 Tromso, Norway
3. Department of Clinical Medicine, University of Tromsø, The Arctic University of Norway, N-9037 Tromso, Norway
4. Department of Oncology, University Hospital of North Norway, N-9038 Tromso, Norway