1. Department of Internal Medicine II, Division of Gastroenterology and Hepatology; Klinikum Hanau, Academic Teaching Hospital of the Medical Faculty of the Goethe University; Frankfurt/Main; Germany
2. Department of Internal Medicine II, Division of Gastroenterology, Hepatology and Infectious Diseases; Friedrich Schiller University; Jena; Germany
3. Department of Medicine I; University Medical Center; Hamburg Eppendorf; Germany
4. Office of the Dean; Medical Faculty of the Goethe University; Frankfurt/Main; Germany