1. Department of Medical Microbiology, Maasstad Ziekenhuis, Rotterdam, the Netherlands
2. Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, the Netherlands
3. Department of Medical Microbiology, University Medical Center Utrecht, Utrecht, the Netherlands
4. Center for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
5. University Medical Center Groningen, University of Groningen, the Netherlands