1. Clinic of Internal Medicine, Telemark Hospital Trust, Skien, Norway
2. Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway
3. Department of Transplantation Medicine, Section of Nephrology, Oslo University Hospital, Oslo, Norway
4. Department of Health Management and Health Economics, University of Oslo, Oslo, Norway
5. Research Support Services, Health Economics, Oslo University Hospital, Oslo, Norway
6. Department of Research and Innovation, Vestfold Hospital Trust, Tonsberg, Norway