Alberto Fogagnolo1, Savino Spadaro2. 1. Unit of Anesthesia and Intensive Care, Department of Morphology, Surgery, and Experimental Medicine, University of Ferrara, Ferrara, Italy - alberto.fogagnolo@gmail.com. 2. Unit of Anesthesia and Intensive Care, Department of Morphology, Surgery, and Experimental Medicine, University of Ferrara, Ferrara, Italy.