1 Unit of Internistic Ultrasound, SSD Gastroenterology, Department of Medicine and Science of Aging, G.D'Annunzio University, Chieti-Pescara, Chieti, Italy. cschiavone@unich.it.
2 Medical‑Surgical Department of Clinical and Experimental Internistics "F. Magrassi and A.Lanzara", Faculty Medicine and Surgery, II University of Naples, Naples, Italy.
3 U.O.C. Radiology Cattinara Hospital, University of Trieste, Trieste, Italy.
4 Complex Operative Unit of Radiology, Vittorio Emanuele Hospital, Catania, Italy.