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