1. Section of Cardiovascular and Renal Research, Oslo University Hospital, Oslo, Norway;
2. Institute of Health and Society, University of Oslo, Oslo, Norway;
3. Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway;
4. Institute of Clinical Medicine, University of Oslo, Oslo, Norway;
5. Department of Transplantation Medicine, Oslo University Hospital, Oslo, Norway;
6. Department of Nephrology, Oslo University Hospital, Oslo, Norway