1. Department of Neurology; University Hospital Bern and University of Bern; Bern Switzerland
2. APHP, INSERM, ICM, Centre d'Investigation Clinique CIC 1422, Département de Neurologie, Hôpital Pitié-Salpêtrière; Paris France
3. Clinique de Neurochirurgie, CHU de Grenoble; Grenoble France
4. Department of Neurosurgery; University Hospital Würzburg; Würzburg Germany
5. Department of Neurosurgery; Inselspital, University Hospital Bern; Bern Switzerland
6. Department of Neurology; University Hospital Würzburg; Würzburg Germany
7. Department of Neurology; University Hospital of Giessen and Marburg; Marburg Germany
8. Department of Stereotactic and Functional Neurosurgery; University of Cologne; Cologne Germany
9. Department of Neurosurgery; Academic Medical Center; Amsterdam The Netherlands