1. Department of General, Visceral, Thoracic, Vascular and Transplant Surgery, Rostock University Medical Center, Schillingallee 35, Rostock 18057, Germany
2. Department of General, Visceral, Thorax, Vascular and Transplantation Surgery, Rostock University Medical Center, Rostock, Germany
3. Institute of Pathology, Rostock University Medical Center, Rostock, Germany