1 Endoscopy Service, Department of Diagnostic and Therapeutic Services, IRCCS - ISMETT, Palermo, Italy.
2 Department of Surgical Oncological and Gastroenterology Sciences, University of Padua, Padua, Italy.
3 Unit of Thoracic Surgery and Lung Transplantation, Department for the Treatment and Study of Cardiothoracic Diseases and Cardiothoracic Transplantation, IRCCS - ISMETT, Palermo, Italy.
4 Pathology Unit, Department of Diagnostic and Therapeutic Services, IRCCS - ISMETT, Palermo, Italy.
5 Department of Surgical, Oncological and Oral Sciences, University of Palermo, Palermo, Italy.