1. Department of General, Visceral, Thoracic, Vascular and Transplantation Surgery, Rostock University Medical Center, 18057 Rostock, Germany
2. Institute for Implant Technology and Biomaterials-IIB E.V, Associated Institute of the University of Rostock, 18119 Warnemuende, Germany
3. 3+ Chirurgen, Berlin-Spandau, 13581 Berlin, Germany
4. Department of General and Visceral Surgery, Bodden-Kliniken Ribnitz-Damgarten, 18311 Ribnitz-Damgarten, Germany