1. Department of Neurology, Leiden University Medical Center, Leiden, the Netherlands
2. Department of Neurology, Haaglanden Medical Center, The Hague, the Netherlands
3. University Neurovascular Center Leiden–The Hague, the Netherlands
4. Emergency Medical Services Hollands–Midden, Leiden, the Netherlands
5. Emergency Medical Services Haaglanden, The Hague, the Netherlands
6. Department of Medical Statistics, Leiden University Medical Center, Leiden, the Netherlands
7. Department of Neurology, Alrijne Hospital, Leiderdorp, the Netherlands
8. Department of Neurology, Groene Hart Hospital, Gouda, the Netherlands
9. Department of Neurology, Haga Hospital, The Hague, the Netherlands
10. Department of Neurology, Reinier de Graaf Gasthuis Hospital, Delft, the Netherlands
11. Department of Neurology, Langeland Hospital, Zoetermeer, the Netherlands