1. The Intervention Centre, Oslo University Hospital, Rikshospitalet, 0027 Oslo, Norway
2. Institute of Clinical Research, Medical Faculty, University of Oslo, 0318 Oslo, Norway
3. Department of Surgery No. 1, Yerevan State Medical University after M. Heratsi, 0025 Yerevan, Armenia
4. Department of Gastrointestinal Surgery, Akershus University Hospital, 1478 Lørenskog, Norway
5. Department of HPB Surgery, Oslo University Hospital, Rikshospitalet, 0407 Oslo, Norway
6. Department of Radiology, Oslo University Hospital, Rikshospitalet, 0027 Oslo, Norway
7. Department of Transplantation Medicine, Oslo University Hospital, Rikshospitalet, 0424 Oslo, Norway