1. Interdisciplinary Endoscopy Center (IEZ), Department of Gastroenterology and Hepatology, University Hospital Heidelberg, Heidelberg, Germany
2. Department of Pathology, University Hospital Heidelberg, Heidelberg, Germany
3. Department of Gastroenterology and Hepatology, University Hospital Heidelberg, Heidelberg, Germany
4. Department of General, Visceral and Transplantation Surgery, University Hospital Heidelberg, Heidelberg, Germany
5. Department of Diagnostic and Interventional Radiology, University Hospital Heidelberg, Heidelberg, Germany