1. National Centre for Ultrasound in Gastroenterology, Haukeland University Hospital, Bergen, Norway
2. Gastroenterology Unit, Department of Biomedical and Clinical Sciences, “L.Sacco” University Hospital, Milan, Italy
3. Department of Radiology, Hospital Barmherzige Brüder, Salzburg, Austria
4. Department of Radiology, Hospital Universitario Doctor Peset, Valencia, Spain
5. Department of Internal Medicine and Medical Specialties, Sapienza University of Rome, Roma, Italy
6. Department of Radiology, Queen Alexandra Hospital, Portsmouth Hospitals NHS Trust, Portsmouth, United Kingdom of Great Britain and Northern Ireland
7. Department of Digestive System, Sant'Orsola-Malpighi Hospital and University of Bologna, Italy
8. Department of Internal Medicine 2, Caritas Krankenhaus, Bad Mergentheim, Germany
9. Dept. of Gastroenterology and Hepatology, "Victor Babes", University of Medicine and Pharmacy Timisoara, Romania
10. Research Center of Gastroenterology and Hepatology, University of Medicine and Pharmacy of Craiova, Romania
11. Gastroenterology and Internal Medicine, Rems-Murr-Klinikum Winnenden, Germany
12. Department of Clinical Medicine, University of Bergen, and Department of Medicine, Haukeland University Hospital, Bergen, Norway
13. Gastroenterology Unit, Department of Systems Medicine, University of Rome Tor Vergata, Roma, Italy
14. Dept. of Radiology, Radiologia 1, Spedali Civili di Brescia, Italy
15. Outpatients Department of Gastroenterology, University Teaching Hospital Lueneburg, Germany
16. Department of Internal Medicine and Gastroenterology, Brandenburg Medical School, Neuruppin, Germany
17. National Centre of Ultrasound in Gastroenterology, Department of Medicine, Haukeland University Hospital, and Department of Clinical Medicine, University of Bergen, Norway