1. National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
2. University of Toronto, UHN, Toronto, ON, Canada
3. University Joseph Fourier, Grenoble
4. Lille University Hospital, Lille
5. National Institute of Health and Medical Research (INSERM), Hôpital de la Pitié-Salpêtrière, Paris
6. Université Lyon I, Hospital Neurologique Pierre Wertheimer, Lyon, France
7. Neurological clinic, Ospedale San Paolo, Italy
8. Christian-Albrechts-Universität Kiel, Kiel, Germany
9. Academic Medical Center of Amsterdam, Amsterdam, The Netherlands
10. University of Arizona, Phoenix, AR
11. The Cleveland Clinic Foundation, OH, USA