1. Department of General, Visceral, Transplant, Vascular and Paediatric Surgery, University Hospital University of Würzburg Würzburg Germany
2. Department of Thoracic Surgery Thoraxklinik at Heidelberg University Hospital Heidelberg Germany
3. Department of General, Visceral and Vascular Surgery Charité University Hospital Berlin Campus Benjamin Franklin Berlin Germany
4. Comprehensive Cancer Centre Mainfranken University of Würzburg Medical Centre Würzburg Germany
5. Department of Biochemistry and Molecular Biology University of Würzburg Würzburg Germany