1 Division of General Surgery 2U and Liver TransplantationAzienda ospedaliero universitaria Città della Salute e della ScienzaMolinette HospitalUniversity of TorinoTorinoItaly.
2 Division of Maxillofacial SurgeryDepartment of Surgical SciencesAzienda ospedaliero universitaria Città della Salute e della ScienzaMolinette HospitalUniversity of TorinoTorinoItaly.
3 Department of Management and Production EngineeringPolytechnic University of TorinoTorinoItaly.