1. Department of Clinical and Experimental Medicine Neurological Institute University of Pisa Pisa Italy
2. Department of Neurology INSELSPITAL University Hospital Bern Bern Switzerland
3. Cerebrovascular Unit Fondazione IRCCS Istituto Neurologico Carlo Besta Milan Italy
4. Neurological Unit St. Bassiano Hospital Bassano del Grappa Italy
5. Department of Neurology and CERVCO DHU Neurovasc INSERM U1141 University of Paris Paris France
6. Department of Neurology INSERM Centre Bordeaux Population Health (U1219) Bordeaux University Hospital University of Bordeaux Bordeaux France
7. Department of Neurology and Division of Neuroradiology, Vascular and Interventional Radiology Department of Radiology Medical University of Graz Graz Austria
8. Department of Medicine, Surgery and Neurosciences University of Siena Siena Italy
9. Department of Neurosciences and Reproductive and Odontostomatological Sciences Federico II University Napoli Italy
10. Krankenanstalt Rudolfstiftung Messerli Institute Vienna Austria
11. MRC Human Genetics Unit Institute of Genetics and Molecular Medicine University of Edinburgh Edinburgh UK
12. Department of Clinical Genetics Leiden University Medical Center Leiden The Netherlands
13. Department of Genetics Lariboisière Hospital and INSERM U1141 Paris‐Diderot University Paris France
14. Stroke Research Group Department of Clinical Neurosciences University of Cambridge Cambridge UK