1 Department of Cardiovascular and Thoracic Sciences, Catholic University of the Sacred Heart, L.go A. Gemelli, 1, 00168 Rome, Italy.
2 Department of Anesthesia and Intensive Care, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Università Cattolica del Sacro Cuore, L.go A. Gemelli, 1, 00168 Rome, Italy.