1. Department of Neurology, Charite-Universitaetsmedizin, Berlin, Germany
2. Department of Neurology, University Hospital of the Saarland, Homburg, Germany
3. Cerebrovascular Center, Cleveland, USA
4. Medical Park Berlin Humboldtmühle, Berlin, Germany
5. Department of Neurology, Hopital Sainte-Anne, Paris, France
6. The Royal Melbourne Hospital, University of Melbourne, Parkville, Australia
7. College of Nursing and College of Medicine Department of Neurology, University of Tennessee Health Science Center, Memphis, USA
8. Memorial Hermann Hospital, Houston, USA