1. Department of Surgery Akademiska University Hospital Uppsala Sweden
2. Clinical Epidemiology Division Department of Medicine Solna Karolinska Institutet Stockholm Sweden
3. Department of Transplantation Medicine Oslo University HospitalRikshospitalet Oslo Norway
4. Department of Nephrology Aarhus University Hospital Aarhus Denmark
5. Department of Nephrology Medical Division Akershus University Hospital Lørenskog Norway
6. Transplantation and Liver Surgery Clinic Helsinki University Hospital Helsinki Finland
7. Department of Nephrology Odense University Hospital Odense Denmark
8. Department of Immunology, Genetics and Pathology Uppsala University Uppsala Sweden
9. Finnish Cancer Registry – Institute for Statistical and Epidemiological Cancer Research Helsinki Finland
10. Faculty of Social Sciences Tampere University Tampere Finland
11. Department of Nephrology, Rigshospitalet Copenhagen University Hospital Copenhagen Denmark
12. Center for Hematology Karolinska University Hospital Stockholm Sweden