1 Department of Intensive Care, Emergency Medicine and Anaesthesiology, Fondazione Policlinico Universitario "Agostino Gemelli", IRCCS, Università Cattolica del Sacro Cuore, Largo Francesco Vito, 1, 00168, Rome, Italy. claudio.sandroni@policlinicogemelli.it.
2 School of Medicine and Surgery University Milano - Bicocca, Monza, Italy.
3 Neuro-Intensive Care Unit, San Gerardo Hospital, ASST-Monza, Monza, Italy.
4 Department of Intensive Care-Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium.