Kjetil Søreide1, Giovanni Marchegiani2. 1. Department of Gastrointestinal Surgery, Hepato-Pancreato-Biliary Unit, Stavanger University Hospital, Stavanger, Norway and, Department of Clinical Medicine, University of Bergen, Bergen, Norway. 2. Department of General and Pancreatic Surgery, Verona Hospital Trust, University of Verona, Verona, Italy.