1 Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany; German Center for Infection Research, Partner Site Hannover, Braunschweig, Germany; Helmholtz Center for Infection Research, Braunschweig, Germany.
2 Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany.