1. Department of Intensive Care Medicine; Academic Medical Center; Amsterdam the Netherlands
2. Department of Intensive Care Medicine; Leiden University Medical Center; Leiden the Netherlands
3. Department of Intensive Care Medicine; VU Medical Center; Amsterdam the Netherlands
4. Department of Intensive Care Medicine; Tergooiziekenhuizen; Hilversum the Netherlands
5. Department of Intensive Care Medicine; Diakonessenhuis; Utrecht the Netherlands