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