[1] Univ Duisburg Essen, Univ Hosp Essen, Dept Gastroenterol & Hepatol, D-45147 Essen, Germany
[2] Knappschafts Klin Bad Neuenahr, D-53474 Bad Neuenahr Ahrweiler, Germany
[3] Univ Med Ctr Hamburg Eppendorf, Dept Med, D-20251 Hamburg, Germany
[4] Univ Hosp Frankfurt, Dept Internal Med 1, D-60590 Frankfurt, Germany
[5] Univ Hosp Tuebingen, Dept Gen Visceral & Transplant Surg, D-72016 Tubingen, Germany
[6] Univ Hosp Regensburg, D-93053 Regensburg, Germany
[7] Caritaskrankenhaus St Josef, Innere Med 1, D-93053 Regensburg, Germany
[8] Univ Hosp Kiel, Dept Transplantat Surg, D-24105 Kiel, Germany
[9] Univ Hosp Jena, Dept Gen Visceral & Vasc Surg, D-07747 Jena, Germany
[10] Univ Hosp Leipzig, Dept Gastroenterol & Rheumatol, D-04103 Leipzig, Germany
[11] Charite Univ Med Berlin, Campus Virchow Klinikum, Campus Charite Mitte, Dept Surg, D-13353 Berlin, Germany
[12] Berlin Inst Hlth, D-13353 Berlin, Germany
[13] Heidelberg Univ, Dept Internal Med, D-69120 Heidelberg, Germany
[14] Salem Med Ctr, Dept Internal Med, D-69120 Heidelberg, Germany
[15] Hannover Med Sch, Integrated Res & Treatment Ctr Transplantat IFB T, D-30625 Hannover, Germany
[16] Hannover Med Sch, Dept Gastroenterol Hepatol & Endocrinol, D-30625 Hannover, Germany
[17] Charite Univ Med Berlin, Campus Virchow Klinikum, Dept Gastroenterol & Hepatol, D-13353 Berlin, Germany