1. Section of Nephrology, Akershus University Hospital, Lorenskog, Oslo
2. Section of Nephrology, Rikshospitalet University Hospital, Oslo University Hospital, Oslo
3. Division of Cancer Medicine and Radiotherapy, Department of Oncology, Norwegian Radium Hospital, Rikshospitalet University Hospital, University of Oslo, Oslo
4. Sectlon of Nephrology, Ullevål Universtity Hospital, Oslo, Norway
5. Division of Surgery, Rikshospitalet University Hospital, Oslo University Hospital, Oslo