1. Center for Tropical Medicine and Travel Medicine, Department of Infectious Diseases, Amsterdam, The Netherlands
2. Dutch HIV Monitoring Foundation (Stichting HIV Monitoring), Amsterdam University Medical Centers (UMC), University of Amsterdam, Amsterdam, The Netherlands
3. Center for Infectious Disease Control, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
4. Departments of Clinical Epidemiology, Biostatistics and Bioinformatics, and , Amsterdam, The Netherlands
5. Medical Microbiology, Amsterdam UMC, University of Amsterdam, and , Amsterdam, The Netherlands
6. Netherlands Reference Laboratory for Bacterial Meningitis, Amsterdam, The Netherlands