1. Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Department of Neurology, Nijmegen, The Netherlands
2. Department of Anaesthesiology, Pain and Palliative Care, Radboud University Medical Center, Nijmegen, The Netherlands
3. Department of Neurology, Medical centre Alkmaar, Alkmaar, The Netherlands
4. Department of Neurology, Elkerliek Hospital, Helmond, The Netherlands
5. Department of Neurology, Gelre Hospital, Apeldoorn, The Netherlands
6. Department of Neurology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands