1 Anesthesiology, Critical Care and Pain Medicine Division, Department of Medicine and Surgery, University of Parma, Parma, Italy Department of Industrial Engineering, University of Parma, Parma, Italy Department of Industrial Engineering, University of Parma, Parma, Italy Unit of General Surgery, Department of Medicine and Surgery, University Hospital of Parma, Parma, Italy Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy Anesthesiology, Critical Care and Pain Medicine Division, Department of Medicine and Surgery, University of Parma, Parma, Italy.