1. Department of Medicine (Neurology), University of Alberta, Alberta, Canada
2. Comprehensive Stroke Center, University of Alabama at Birmingham Hospital, Birmingham, AL, USA
3. Department of Neurology, University of Athens School of Medicine, Athens, Greece
4. Neurovascular Unit, Neurology Department, Hospital University Vall d'Hebron, Barcelona, Spain
5. Department of Clinical Neurosciences, University of Calgary, Foothills Medical Centre, Calgary, Alberta, Canada
6. Non-invasive Cerebrovascular Study Laboratory, Methodist Hospital, Houston, TX, USA
7. Department of Neurology, University of Texas-Houston Medical School, Houston, TX, USA
8. Department of Neurology, University of Miami, Miller School of Medicine, Miami, FL, USA
9. Department of Neurology, Masaryk University, St Anne's Hospital, Brno, Czech Republic
10. Division of Neurology, Department of Medicine, National University Hospital, Singapore, Singapore
11. Department of Neurology, Clinica Alemana de Santiago, Santiago, Chile
12. Stroke Unit, Department of Neurology, La Paz University Hospital, Madrid, Spain
13. Neurologische Universitatsklinik, Schwabachanlage 6, 91054, Erlangen, Deutschland