1. Department of Medicine, Stavanger University Hospital, Stavanger, Norway
2. Department of Cancer Genomics, Haukeland University Hospital, Bergen, Norway
3. Department of Medicine, Haukeland University Hospital, Bergen, Norway
4. Norwegian Porphyria Centre and Department of Medical Biochemistry and Pharmacology, Haukeland University Hospital, Bergen, Norway
5. Norwegian Organization for Quality Improvement of Laboratory Examinations, Haraldsplass Deaconess Hospital, Bergen, Norway
6. Department of Clinical Science, Faculty of Medicine, University of Bergen, Bergen, Norway