1 Department of Anesthesia and Intensive Care, IRCCS San Raffaele Scientific Institute, Milan, Italy. Electronic address: scquizzato.tommaso@hsr.it.
2 Department of Intensive Care, Emergency Medicine and Anaesthesiology, Fondazione Policlinico Universitario A. Gemelli, IRCCS, Rome, Italy; Institute of Anaesthesiology and Intensive Care Medicine, Università Cattolica del Sacro Cuore, Rome, Italy.
3 Southmead Hospital, North Bristol NHS Trust, Bristol, United Kingdom.
4 University of Warwick, Warwick Medical School, Coventry, United Kingdom; Department of Anaesthesia and Intensive Care Medicine, Royal United Hospital, Bath, United Kingdom.