1. Department for Surgical Research; General Visceral and Transplantation Surgery; University Hospital Essen; Essen Germany
2. Institute of Pathology; University Hospital Essen; Essen Germany
3. RTOMIT; INSERM; Université de Médecine et de Pharmacie de Poitiers; Poitiers France
4. Department of Surgery; University Medical Center Groningen; The Netherlands