Michael P Casaer1, Audrey De Jong2,3, Anders Perner4. 1. Clinical Department and Laboratory of Intensive Care Medicine, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, 3000, Leuven, Belgium. michael.casaer@uz.kuleuven.ac.be. 2. University of Montpellier, INSERM U1046, CNRS UMR 9214, Montpellier, France. 3. Anesthesia and Critical Care Department B, Saint Eloi Teaching Hospital, Centre Hospitalier Universitaire Montpellier, 34295, Montpellier Cedex 5, France. 4. Department of Intensive Care, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.