1. Department of Internal Medicine III, Division of Gastroenterology and Hepatology, Medical University of Vienna, Vienna, Austria;
2. Quality Assurance Working Group, Austrian Society of Gastroenterology and Hepatology, Vienna, Austria;
3. Institute of Clinical Biometrics, Center for Medical Data Science, Medical University of Vienna, Vienna, Austria;
4. Department of Internal Medicine I, St. John of God Hospital, Vienna, Austria.