1. Department of Surgery PO SS. Trinità, Cagliari, Italy
2. Department of Surgical Science, University of Cagliari, Italy
3. Department of Architecture, Design and Urban Planning, University of Sassari, Italy
4. Department of Medical, Surgical and Experimental Sciences, University of Sassari, Italy
5. Emergency Surgery and Trauma, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, Rome, Italy
6. Policlinico Universitario Umberto I, Rome, Italy