1. Department of Organ Transplantation Oslo University Hospital Rikshospitalet Oslo Norway
2. Division of Nephrology Department of Medicine Oslo University Hospital Ullevål Oslo Norway
3. Clinical Institute of Medical and Chemical Laboratory Diagnostics Medical University of Graz Graz Austria
4. Synlab Center of Laboratory Diagnostics Heidelberg Germany
5. Medical Faculty Mannheim Mannheim Institute of Public Health, Social and Preventive Medicine University of Heidelberg Mannheim Germany
6. Division of Nephrology Department of Medicine Sykehuset i Vestfold Tønsberg Norway
7. Department of Research and Development Oslo University Hospital Ullevål Oslo Norway
8. Division of Nephrology Department of Internal Medicine Uppsala University Hospital Uppsala Sweden
9. British Heart Foundation Glasgow Cardiovascular Researh Centre Glasgow UK
10. Division of Endocrinology and Metabolism Department of Internal Medicine Medical University of Graz Graz Austria
11. Department of Epidemiology and Biostatistics EMGO Institute for Health and Care Research VU University Medical Centre Amsterdam the Netherlands