1. Legal Medicine, Dpt of Medical and Surgical Sciences DIMEC, Alma Mater Studiorum, University of Bologna, Italy
2. Med. Klinik 2, Caritas Krankenhaus, Bad Mergentheim, Germany
3. National Centre for Ultrasound in Gastroenterology, Haukeland University Hospital, and Department of Clinical Medicine, University of Bergen, Bergen, Norway
4. Internal Medicine, Dpt of Medical and Surgical Sciences DIMEC, Alma Mater Studiorum, University of Bologna, Italy