1. Sana Hospital Lichtenberg, Medical Department I/Gastroenterology, Berlin, Germany
2. Department Allgemeine Innere Medizin der Kliniken (DAIM) Hirslanden Beau Site, Salem und Permanence, Bern, Switzerland
3. Krankenhaus Märkisch-Oderland, Department of Internal Medicine, Strausberg, Germany; Brandenburg Institute for Clinical Ultrasound (BICUS) at Medical University Brandenburg, Neuruppin, Germany
4. Translational Gastroenterology Unit, Oxford University Hospitals, Oxford, United Kingdom; and Medical Department B, University Muenster, Germany
5. Medical Department, Helios Klinikum Meiningen, Germany
6. Leeds Teaching Hospitals NHS Trust, Leeds, United Kingdom
7. Department of Ultrasound, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
8. Department of Endoscopy Center, Shengjing Hospital of China Medical University, Liaoning Province, China
9. Inselspital, University Hospital of Bern, Switzerland
10. Department of Radiology, University of Verona, Verona, Italy.