1. Department of Internal Medicine, Krankenhaus Märkisch Oderland Strausberg/Wriezen, Germany
2. Department of Internal Medicine 2, Helios Hospital Meiningen GmbH, Meiningen, Germany
3. Gastroenterology Unit, Department of Medical and Surgical Sciences University of Bologna/Hospital of Imola, Italy
4. National Centre for Ultrasound in Gastroenterology, Haukeland University Hospital, Bergen and Department of Clinical Medicine, University of Bergen, Bergen, Norway
5. Department of Gastroenterology and Endoscopy, Ospedale Maggiore Crema, Italy
6. Department of Medicine and National Centre for Ultrasound in Gastroenterology, Haukeland University Hospital, Bergen, Norway
7. Department of Internal Medicine 2, Caritas Krankenhaus, Bad Mergentheim, Germany
8. Department of Gastroenterology, Research Center of Gastroenterology and Hepatology, University of Medicine and Pharmacy, Craiova, Romania and Department of Endoscopy, Gastrointestinal Unit, Copenhagen University Hospital Herlev, Denmark
9. GastroUnit, Department of Surgery, University Hospital Herlev, Copenhagen, Denmark
10. Department of Internal Medicine I, Sana Kliniken, Luebeck, Germany
11. Department of Gastric Surgery, Ultrasound Section, Herlev Hospital, University of Copenhagen, Denmark
12. Department of Gastroenterology, Brandenburg University of Medicine Theodor Fontane, Neuruppin, Germany
13. Department of Radiology, GB Rossi University Hospital, University of Verona, Italy
14. Unit of Internal Medicine, Department of Medical and Surgical Sciences, University of Bologna, Italy
15. Department of Radiology, King's College Hospital, London, UK