1 Department of Anaesthesiology and Intensive Care Medicine, Pulmonary Engineering Group, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany. Electronic address: mgabreu@ukdd.de.
2 Department of Intensive Care Medicine and Laboratory of Experimental Intensive Care and Anaesthesiology, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands.
3 Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, Genoa, Italy; San Martino Policlinico Hospital, IRCCS for Oncology and Neurosciences, Genoa, Italy.