1. Department of General Practice, Amsterdam UMC/University of Amsterdam, Amsterdam, Netherlands
2. Department of Clinical Epidemiology, Amsterdam UMC/University of Amsterdam, Amsterdam, Netherlands
3. Department of Internal Medicine, Amsterdam UMC/University of Amsterdam, Amsterdam, Netherlands
4. Centre for Infectious Disease Control, National Institute for Public Health and Environment, Bilthoven, Netherlands
5. Department of Medical Microbiology and Infection Control, Amsterdam UMC/VU Medical Centre, Amsterdam, Netherlands