1 General Surgery, Department of Oncology Transplantation and New Technologies, University of Pisa, Via Paradisa 2, 56124, Pisa, Italy.
2 EndoCAS (Center for Computer Assisted Surgery), University of Pisa, Pisa, Italy.
3 General Surgery, Department of Oncology Transplantation and New Technologies, University of Pisa, Via Paradisa 2, 56124, Pisa, Italy. gregoriodifranco@yahoo.it.
4 Department of Surgery & Surgical Pathology, University of Pisa, Pisa, Italy.
5 Division of Psychiatry, Pisa University Hospital, Pisa, Italy.