1. Department of Surgery and Transplantation University Hospital RWTH Aachen Aachen Germany
2. Department of Internal Medicine III University Hospital RWTH Aachen Aachen Germany
3. Institute of Radiology University Hospital RWTH Aachen Aachen Germany
4. Department of Internal Medicine Division of Gastroenterology and Hepatology Maastricht University Medical Centre (MUMC) Maastricht The Netherlands
5. Department of Surgery Maastricht University Medical Centre (MUMC) Maastricht The Netherlands