1. Department of Medical Microbiology, Leiden University Medical Center , Leiden , The Netherlands
2. Department of Medical Microbiology, Albert Schweitzer Hospital , Dordrecht , The Netherlands
3. Department of Intensive Care, Leiden University Medical Center , Leiden , The Netherlands
4. Directorate of Education (DOO), Leiden University Medical Center , Leiden , The Netherlands
5. Department of Infectious Diseases, Leiden University Medical Center , Leiden , The Netherlands
6. Department of Clinical Epidemiology, Leiden University Medical Center , Leiden , The Netherlands