1 Department of Intensive Care Medicine, Elisabeth Tweesteden Ziekenhuis, Tilburg, The Netherlands. Electronic address: jah.vanoers@etz.nl.
2 Department of Critical Care, University Medical Center Groningen, University of Groningen, The Netherlands. Electronic address: m.w.n.nijsten@umcg.nl.
3 Department of Intensive Care Medicine, Rode Kruis Ziekenhuis, Beverwijk, The Netherlands. Electronic address: edejong@rkz.nl.
4 Department of Intensive Care Medicine, Medisch Spectrum Twente, Enschede, The Netherlands. Electronic address: B.Beishuizen@mst.nl.
5 Department of Intensive Care Medicine, University Medical Centre Utrecht, Utrecht, The Netherlands. Electronic address: D.W.deLange@umcutrecht.nl.