1. Faculty of Medicine, University of Oslo, Oslo, Norway
2. Section of Clinical Immunology and Infectious Diseases, Oslo University Hospital, Oslo, Norway
3. Research Institute of Internal Medicine, Oslo University Hospital, Oslo, Norway
4. Department of Microbiology, Oslo University Hospital, Oslo, Norway
5. Section for Transplantation Surgery, Department of Transplantation Medicine, Oslo University Hospital, Oslo, Norway
6. Department of Hepato-Pancreatico-Biliary Surgery, Oslo University Hospital, Oslo, Norway
7. Department of Radiology, Oslo University Hospital, Oslo, Norway