1. Department of Molecular Microbiology and Institute of Biomembranes; Utrecht University; Paudalaan 8 Utrecht 3584 CH The Netherlands
2. Department of Medical Microbiology; University Medical Center Utrecht; Utrecht The Netherlands
3. Section Cellular Architecture and Dynamics; Department of Biology; Utrecht University; Paudalaan 8 Utrecht 3584 CH The Netherlands
4. Department of Medical Microbiology; Academic Medical Center; Amsterdam The Netherlands
5. Netherlands Reference Laboratory for Bacterial Meningitis; Academic Medical Center; Amsterdam The Netherlands