1. Department of Surgery, Nordland Hospital, Bodø, Norway.
2. Institute of Clinical Medicine, University of Tromsø, Norway.
3. Department of Anesthesiology, Nordland Hospital, Bodø, Norway.
4. University of Nordland, Bodø, Norway.
5. Somatic Research Laboratory, Nordland Hospital, Bodø, Norway.
6. Department of Medicine, Nordland Hospital, Bodø, Norway.