1 Abdominal Surgery and Organ Transplantation Unit, Department for the Treatment and Study of Abdominal Diseases and Abdominal Transplantation, University of Pittsburgh Medical Center Italy, Palermo, Italy.
2 Istituto di Ricovero e Cura a Carattere Scientifico-Istituto Mediterraneo per i Trapianti e Terapie ad Alta Specializzazione, University of Pittsburgh Medical Center Italy, Palermo, Italy.
3 Department of Pediatrics, University of Pittsburgh Medical Center Italy, Palermo, Italy.
4 Diagnostic and Therapeutic Services, Radiology Unit, University of Pittsburgh Medical Center Italy, Palermo, Italy.
5 Department of Surgery and Medical and Surgical Specialties, University of Catania, Catania, Italy.