1. Department of Neurology, Leiden University Medical Center (LUMC), the Netherlands
2. Department of Psychiatry, Leiden University Medical Center (LUMC), the Netherlands
3. Headache and Neurological Pain Research Group, Institut de Recerca (VHIR), Universitat Autònoma de Barcelona, Barcelona
4. Department of Human Genetics, Leiden University Medical Center (LUMC), the Netherlands
5. Department of Human Genetics, Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, United Kingdom
6. FORMI, Oslo University Hospital, Norway
7. Department of Neurology, Oslo University Hospital, Norway
8. Institute of Clinical Medicine, University of Oslo, Norway
9. Analytical and Translational Genetics Unit, Department of Medicine, Massachusetts General Hospital and Harvard Medical School, USA
10. Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, USA
11. Institute for Molecular Medicine Finland (FIMM), University of Helsinki, Finland
12. Stroke Genetics and Pharmacogenetics, Fundació per la Docència i Recerca Mutua Terrassa, Spain
13. Neurovascular Research Laboratory, Vall d’Hebron Institute of Research, Universidad Autonoma de Barcelona, Spain
14. Pediatric Neurology Research Group, Institut de Recerca (VHIR), Universitat Autònoma de Barcelona, Spain
15. Departament de Genètica, Facultat de Biologia, Universitat de Barcelona, Spain
16. Centre for Biomedical Network Research on Rare Diseases (CIBERER), Spain
17. Department of Epidemiology, Erasmus University Medical Center, the Netherlands
18. Institute of Biomedicine of the University of Barcelona (IBUB), Spain
19. Neurology Department, Hospital Universitari Vall d’Hebron (HUVH), Spain