1. Medical Clinic B, Department of Gastroenterology, Hepatology, Endocrinology, Clinical Infectiology, University Hospital Muenster, Muenster, Germany
2. Institute of Biostatistics and Clinical Research, University of Muenster, Muenster, Germany
3. Department of Internal Medicine I, University of Bonn, Bonn, Germany
4. Department of Internal Medicine I, Goethe University Frankfurt, Frankfurt, Germany
5. Institute of Clinical Radiology, University Hospital Muenster, Muenster, Germany
6. Institute of Radiology, University of Bonn, Bonn, Germany
7. Department of Radiology, University Hospital Ludwig-Maximilians-Universität – Campus Großhadern, Munich, Germany