1. Department of Neurology, Zuwe Hofpoort Hospital, Woerden, The Netherlands
2. National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
3. Department of Medical Microbiology and Immunology, St. Antonius Hospital, Nieuwegein, The Netherlands
4. Department of Medical Microbiology, Zuwe Hofpoort Hospital, Woerden, The Netherlands
5. Department of Internal Medicine, Zuwe Hofpoort Hospital, Woerden, The Netherlands