1 Unit of Digestive Surgery, Department of Clinical and Experimental Medicine, Careggi University Hospital, Florence, Italy - fabio.staderini@unifi.it.
2 Unit of Interventional Endoscopy, Department of Oncology and Robotic Surgery, Careggi University Hospital, Florence, Italy.
3 Unit of Digestive Surgery, Department of Clinical and Experimental Medicine, Careggi University Hospital, Florence, Italy.