1. Department of Internal Medicine 1, Goethe-University Hospital, Frankfurt, Main, Germany
2. Department of Gastroenterology/Internal Medicine, St. Vinzenz-Hospital Hanau, Hanau, Germany
3. Department of Gastroenterology, Hepatology and Endocrinology, Robert-Bosch Hospitals, Stuttgart, Germany
4. Institute of Biostatistics and Mathematical Modeling, Goethe-University, Frankfurt, Main, Germany
5. Department of Gastroenterology/Internal Medicine, Klinikum Hanau, Hanau, Germany
6. Department of Internal Medicine and Gastroenterology, “Iuliu Hatieganu” University of Medicine and Pharmacy, Cluj-Napoca City, Cluj, Romania
7. Department of Gastroenterology, Klinikum Stuttgart, Stuttgart, Germany