1. Department of Internal Medicine 2, Caritas Krankenhaus, Bad Mergentheim, Germany
2. Department of Gastroenterology, Surgical Section, Herlev Hospital, University of Copenhagen, Herlev, Denmark
3. Department of Radiology, King’s College Hospital, London, UK
4. Department of Internal Medicine, Krankenhaus Märkisch Oderland, Strausberg/Wriezen, Germany
5. National Centre for Ultrasound in Gastroenterology, Department of Medicine, Haukeland University Hospital, Bergen, Norway and Department of Clinical Medicine, University of Bergen, Norway
6. Unit of Internal Medicine, Dept of Medical and Surgical Sciences, University of Bologna Hospital S.Orsola Malpighi, Bologna, Italy