1. Department of Hepato-Pancreato-Biliary Surgery Oslo University Hospital Rikshospitalet Sognsvannsveien 20 0372 Oslo Norway
2. Department of Hepato-Pancreato-Biliary Surgery, Oslo University Hospital, Oslo, Norway
3. Institute of Clinical Medicine, University of Oslo, Oslo, Norway
4. The Intervention Centre, Oslo University Hospital—Rikshospitalet, Oslo, Norway
5. Department of Research & Development, Division of Emergencies and Critical Care, Oslo University Hospital, Oslo, Norway
6. Department of Surgery N1, Yerevan State Medical University after M. Heratsi, Yerevan, Armenia