1. Department of Radiology, Clemenshospital GmbH Munster, Germany
2. Department of Gastroenterology, Lüneburg Municipal Hospital Clinic for General Internal Medicine and Gastroenterology, Lüneburg, Germany
3. Department for CED, praxis for internal medicine and CED, Himmelreichallee 37-41, Muenster, Germany
4. center for gastrointestinal diseases, mvz portal 10 Muenster, Germany
5. Imaging and Prevention Center, Conradia Radiology Munich, Germany
6. Department of interventional and diagnostic radiology, Schmieder Hospitals – Hospital Konstanz, Germany
7. Department of Radiology, MHH, Hannover, Germany
8. Department of Radiology, Evangelical Hospital Düsseldorf Medical Clinic, Düsseldorf, Germany
9. Institute of diagnostic and interventional radiology, Brandenburg Medical School Theodor Fontane, University Hospital Brandenburg a. d. Havel, Germany