1 Department of Internal Medicine, Krankenhaus Märkisch Oderland Strausberg/Wriezen, Strausberg, Germany.
2 Department of Radiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.
3 Alma Mater Studiorum, University of Bologna, Bologna, Italy.
4 Department Allgemeine Innere Medizin, Kliniken Hirslanden Beau Site, Salem und Permanence, Bern, Switzerland.
5 National Centre for Ultrasound in Gastroenterology, Haukeland University Hospital, Bergen, and Department of Clinical Medicine, University of Bergen, Norway.
6 Radiology, King's College London, London, United Kingdom.
7 University of Medicine and Pharmacy, Craiova, and Ponderas Academic Hospital Bucharest, Romania.
8 Gastroenterology, University of Medicine and Pharmacy Timisoara, Timisoara, Romania.
9 Department of Radiology, "Sapienza" University of Rome, Rome, Italy.
10 Center for Anatomy and Cell Biology, Medical University of Vienna and Radiology, Hanusch Hospital, Vienna, Austria.