1. Department of Digestive Surgery, Akershus University Hospital, Lørenskog, Norway.
2. Department of Digestive Surgery, Vestfold Hospital Trust, Tønsberg, Norway.
3. Intervention Centre, Oslo University Hospital—Rikshospitalet, Oslo, Norway.
4. Department of Surgery, Yerevan State Medical University after Mkhitar Heratsi, Yerevan, Armenia.
5. Department of Faculty Surgery N 2, I.M.Sechenov First Moscow State Medical University, Moscow, Russia.
6. Anatomy Sector, Department of Cell Physiology and Metabolism, Faculty of Medicine, University of Geneva, Geneva, Switzerland.
7. Institute for Clinical Medicine, University of Oslo, Oslo, Norway.
8. Department of Hepatopancreatobiliary Surgery, Oslo University Hospital—Rikshospitalet, Oslo, Norway.