Matteo Palmeri1, Gregorio Di Franco2, Niccolò Furbetta2, Luca Morelli2,3. 1. General Surgery, Department of Surgery, Translational and New Technologies in Medicine, University of Pisa, Pisa, Italy. palmeri.matteo@gmail.com. 2. General Surgery, Department of Surgery, Translational and New Technologies in Medicine, University of Pisa, Pisa, Italy. 3. EndoCAS (Center for Computer Assisted Surgery), University of Pisa, Pisa, Italy.