[1] Univ Leipzig, Med Ctr, Dept Visceral Transplant Thorac & Vasc Surg, Liebigstr 20, D-04103 Leipzig, Germany
[2] Johannes Gutenberg Univ Mainz, Med Ctr, Dept Gen Visceral & Transplant Surg, Mainz, Germany
[3] DKD German Diagnost Clin, Helios Clin, Dept Gastroenterorl, Wiesbaden, Germany
[4] EvK Protestant Hosp Castrop Rauxel, Dept Surg, Castrop Rauxel, Germany