1. Department of Hospital Pharmacy, Erasmus University Medical Center, Rotterdam, The Netherlands
2. Department of Intensive Care, Erasmus University Medical Center, Rotterdam, The Netherlands
3. Department of Intensive Care, Haga Hospital, The Hague, The Netherlands
4. Department of Medical Microbiology and Infectious Diseases, Erasmus University Medical Center, Rotterdam, The Netherlands
5. Department of Medical Microbiology, Haaglanden Medical Center, The Hague, The Netherlands