1 Department of Anaesthesia and Intensive Care, University Hospital of Modena, University of Modena and Reggio Emilia, Modena, Italy. girardis.massimo@unimore.it.
2 Department of Anaesthesia and Intensive Care, University Hospital of Modena, University of Modena and Reggio Emilia, Modena, Italy.
3 Institute of Intensive Care Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland.