[1] Univ Leipzig, Dept Oncol Gastroenterol Hepatol Pulmonol & Infec, Med Ctr, Leipzig, Germany
[2] Univ Med Ctr Gottingen, Dept Gen Visceral & Pediat Surg, Gottingen, Germany
[3] Univ Hosp Leipzig, Dept Visceral Transplant Thorac & Vasc Surg, Leipzig, Germany
[4] Kliniken Maria Hilf GmbH, Klin Hamatol Onkol & Gastroenterol, Monchengladbach, Germany
[5] Ludwig Maximilians Univ Munchen, Dept Med 3, Univ Hosp, Munich, Germany