1 Gastroenterology and Endoscopy Unit, Fondazione Istituto G. Giglio, Contrada Pietrapollastra Pisciotto, 90015, Cefalù, Palermo, Italy. emanuelesinagra83@googlemail.com.
2 Department of Surgical, Oncological and Oral Sciences (Di.Chir.On.S.), Unit of General and Oncological Surgery, Paolo Giaccone University Hospital, University of Palermo, Via del Vespro 129, 90127, Palermo, Italy.
3 Endoscopy Service, Department of Diagnostic and Therapeutic Services, Istituto Mediterraneo Per I Trapianti E Terapie Ad Alta Specializzazione, Palermo, Italy.