1 Division of Surgery, Ospedale "Sacro Cuore-Don Calabria," Negrar (VR), Italy; Department of Surgery, University of Verona, Verona, Italy; Division of Pancreatic and Digestive Surgery, Università Politecnica delle Marche, Ospedali Riuniti, Ancona, Italy. Electronic address: ste.crippa@libero.it.
2 Division of Surgery, Ospedale "Sacro Cuore-Don Calabria," Negrar (VR), Italy; Department of Surgery, University of Verona, Verona, Italy; Division of Pancreatic and Digestive Surgery, Università Politecnica delle Marche, Ospedali Riuniti, Ancona, Italy.
3 Division of Surgery, Ospedale "Sacro Cuore-Don Calabria," Negrar (VR), Italy; Department of Surgery, University of Verona, Verona, Italy.