1 Section of Gastroenterology, Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy.
2 Radiology Unit, IRCCS De Bellis, Castellana Grotte, Bari, Italy.
3 Section of Gastroenterology, Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy. Electronic address: alfredo.dileo@uniba.it.