1. Harvard School of Public Health, Boston, Massachusetts
2. University of British Columbia, Vancouver, Canada
3. Bayer HealthCare, Berlin, Germany
4. VU University Medical Center, Amsterdam, the Netherlands
5. Ottawa Hospital Research Institute, Ottawa, Canada
6. Heinrich-Heine Universität, Düsseldorf, Germany
7. University College London Institute of Neurology, London, England
8. Hospital Universitari Vall d’Hebron, Barcelona, Spain
9. CHU-Hôpital Pontchaillou, Rennes, France
10. Bayer HealthCare Pharmaceuticals, Montville, New Jersey
11. University Hospital Basel, Basel, Switzerland
12. Bayer HealthCare, Berlin, Germany6Heinrich-Heine Universität, Düsseldorf, Germany
13. Bayer HealthCare, Berlin, Germany12Department of Neurology, University Hospital of Bonn, Bonn, Germany