1. Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Medical Department, Division of Hepatology and Gastroenterology, Campus Virchow-Klinikum and Campus Charité Mitte, 10117 Berlin, Germany
2. Berlin Institute of Health (BIH), 10178 Berlin, Germany
3. Department of Internal Medicine and Gastroenterology, Asklepios Klinik St. Georg, Asklepios Tumorzentrum Hamburg ATZHH, 20099 Hamburg, Germany