1. UOC of General and Minimally Invasive Surgery, Hospital “San Paolo,” Civitavecchia, Rome, Italy.
2. Department of General Surgery and Surgical Specialties “Paride Stefanini,” Sapienza University of Rome, Rome, Italy.
3. Dipartimento di Chirurgia Generale e Trapianti, Ospedale San Camillo-Forlanini, Rome, Italy.