1. Department of Intensive Care Medicine, Luzerner Kantonspital, Luzern, Switzerland;
2. Department of Intensive Care Medicine, Maastricht University Medical Centre, Maastricht, The Netherlands;
3. Department of Respiratory Medicine, Maastricht University Medical Centre, Maastricht, The Netherlands;
4. Department of Methodology and Statistics, Maastricht University, School for Public Health and Primary Care (CAPHRI), Maastricht, The Netherlands;
5. Department of Medical Microbiology, Maastricht University Medical Centre, Maastricht, The Netherlands;
6. Department of Intensive Care Medicine and Internal Medicine, Zuyderland Medical Centre, Heerlen, The Netherlands;
7. Department of Medical Microbiology, Zuyderland Medical Centre, Heerlen, The Netherlands;
8. Department of Medical Microbiology & Infection Control, VU University Medical Centre, Amsterdam, The Netherlands