1. Gastroenterology Unit, Department of Medical and Surgical Sciences University of Bologna,Hospital of Imola, Italy
2. Department of Internal Medicine, Krankenhaus Märkisch Oderland, Strausberg/ Wriezen, Germany
3. Dept of Internal Medicine 2, Helios Hospital Meiningen GmbH, Meiningen, Germany
4. Department of Internal Medicine I, Sana Kliniken, Luebeck, Germany
5. UO Gastroenterologia, 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. Gastrointestinal Unit, Department of Surgery, University Hospital Herlev, Copenhagen, Denmark
10. Department of Gastric Surgery, Ultrasound Section, Herlev Hospital, University of Copenhagen, Denmark
11. Department of Gastroenterology, Brandenburg University of Medicine Theodor Fontane, Neuruppin, Germany
12. Department of Radiology, GB Rossi University Hospital, University of Verona, Italy
13. National Centre for Ultrasound in Gastroenterology, Haukeland University Hospital, Bergen and Department of Clinical Medicine, University of Bergen, Bergen, Norway
14. Unit of Internal Medicine, Dept of Medical and Surgical Sciences, University of Bologna, Hospital S.Orsola Malpighi, Bologna, Italy
15. Department of Radiology, King’s College Hospital, London, UK