1. Section of Gastroenterology and Hepatology, Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties, PROMISE, University of Palermo, Palermo, Italy.
2. Department of Surgical, Oncological and Oral Sciences (Di.Chir.On.S.), University of Palermo, Palermo, Italy.
3. 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.
4. Department of Surgery and Surgical and Medical Specialties, University of Catania, Catania, Italy.