[1] University Hospital of Essen,Department of General Surgery and Transplantation
[2] University Hospital of Graz,Department of General Surgery
[3] Ghent University Hospitals,Department of Digestive Surgery
[4] Aarhus Kommunehospital,Department of Surgery L
[5] Medizinische Hochschule Hannover,Department of Abdominal and Transplantation Surgery
[6] Karolinska Institute at Huddinge University Hospital,Department of Surgery
[7] Inselspital,Department of Visceral and Transplantation Surgery
[8] Ain-Shams University,Department of General Surgery