[1] Univ Tubingen Hosp, Div Nephrol, Med Ctr Schwerin, Sect Nephrol & Hypertens, Tubingen, Germany
[2] Univ Tubingen Hosp, Dept Gastroenterol, Tubingen, Germany
[3] Univ Hosp Bochum, Dept Surg, Knappschaftskrankenhaus Langendreer, Bochum, Germany
[4] Univ Hosp Bochum, Dept Transplantat, Knappschaftskrankenhaus Langendreer, Bochum, Germany