1. Section of Gastroenterology, DIBIMIS, University of Palermo, Piazza delle Cliniche 2, Palermo, Italy
2. Section of Gastroenterology, DIBIMIS, University of Palermo, Piazza delle Cliniche 2, Palermo, Italy. .
3. Department of Radiology, DIBIMEF, University Palermo, Italy
4. Intensive Care & Emergency Institute, DIBIMEF, University of Palermo, Italy