1 Anaesthesiology, critical care and pain medicine division, department of medicine and surgery, University of Parma, viale Gramsci, 14, 43126 Parma, Italy. Electronic address: bellini.vnt@gmail.com.
2 Department of industrial engineering, University of Parma, via G.P. Usberti, 181/A, 43126 Parma, Italy. Electronic address: alberto.petroni@unipr.it.
3 Department of industrial engineering, University of Parma, via G.P. Usberti, 181/A, 43126 Parma, Italy. Electronic address: gpalumbomed@gmail.com.
4 Anaesthesiology, critical care and pain medicine division, department of medicine and surgery, University of Parma, viale Gramsci, 14, 43126 Parma, Italy. Electronic address: elenagiovanna.bignami@unipr.it.