1. Department of General Practice, Institute of Health and Society, University of Oslo (UiO), Norway
2. Institute of Clinical Medicine, University of Oslo (UiO), Norway
3. Department of Endocrinology, Oslo University Hospital (OUS), Norway
4. Norwegian Quality Improvement of Laboratory Examinations, Haraldsplass Deaconess Hospital, Bergen (HDS), Norway
5. Division of Medicine, Stavanger University Hospital (SUS), Norway
6. Department of Global Public Health and Primary Care, University of Bergen (UiB), Norway
7. Clinic For Medicine, Nordland Hospital, Bodø, Norway