1. Radboud University Medical Centre, Donders Institute for Brain, Cognition and Behaviour, Department of Rehabilitation, Nijmegen, the Netherlands
2. Department of Rehabilitation, Sint Maartenskliniek, Nijmegen, the Netherlands
3. Department of Neurology, Besançon University Hospital, Besançon, France
4. Radboud University Medical Centre, Donders Institute for Brain, Cognition and Behaviour, Center of Expertise for Parkinson & Movement Disorders, Department of Neurology, Nijmegen, the Netherlands