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