Hepatobiliary manifestations in patients with ulcerative colitis: a retrospective analysis oleh Katharina Stratmann, Songül Aydolmus, Wenyi Gu, Dominik Heling, Ulrich Spengler, Birgit Terjung, Christian P. Strassburg, Richard Vollenberg, Irina Blumenstein, Jonel Trebicka, Jonel Trebicka, Jonel Trebicka