1. Institute of Clinical Medicine, University of Tromsø
2. Department of Medical Biochemistry, University Hospital of North Norway, Tromsø and Institute of Medical Biology, University of Tromsø
3. Institute of Community Medicine, University of Tromsø
4. Department of Cardiology, University Hospital of North Norway,
Tromsø
5. Medical Clinic, University Hospital of North Norway,
Tromsø, Norway