1. Department of Medicine Stavanger University Hospital Stavanger Norway
2. Department of Global Public Health and Primary Care University of Bergen Bergen Norway
3. Department of Research Section of Biostatistics Stavanger University Hospital Stavanger Norway
4. Norwegian Organization for Quality Improvement of Laboratory Examinations (Noklus) Haraldsplass Deaconess Hospital Bergen Norway
5. Department of Clinical Science Faculty of Medicine University of Bergen Bergen Norway
6. Institute of Clinical Medicine Faculty of Medicine University of Oslo Oslo Norway
7. Department of Endocrinology, Morbid Obesity and Preventive Medicine Oslo University Hospital Oslo Norway
8. General Practice Research Unit (AFE) Department of General Practice Institute of Health and Society University of Oslo Oslo Norway
9. Nordland Hospital Department of Medicine Bodø Norway
10. Department of Medical Biochemistry and Pharmacology Haukeland University Hospital Bergen Norway