1. Department for the Treatment and Study of Abdominal Diseases and Abdominal Transplantation, IRCCS ISMETT (Istituto di Ricovero e Cura a Carattere Scientifico—Istituto Mediterraneo per i Trapianti e Terapie ad Alta Specializzazione), UPMC (University of Pittsburgh Medical Center) Italy, Palermo, Italy.
2. Department of Surgery and Surgical and Medical Specialties, University of Catania, Catania, Italy.