From the Department of Anesthesia and Intensive Care, University Hospital San Luigi Gonzaga (VR) and University of Turin, Italy (MM, CS, VR)

Correspondence to Vincenzo Russotto, Department of Anesthesia and Intensive Care, Regione Gonzole, Orbassano (TO), University Hospital San Luigi Gonzaga, University of Turin, Italy. Tel: +39 3297893044; e-mail: [email protected]