1. Donders Institute for Brain, Cognition and Behaviour, Department of Rehabilitation, Radboud University Medical Centre, Nijmegen, the Netherlands
2. Department of Rehabilitation, Sint Maartenskliniek, Nijmegen, the Netherlands
3. Centre of Clinical Neuroscience, Department of Neurology, First Faculty of Medicine, General University Hospital, Charles University in Prague, Prague, Czech Republic
4. Department of Rehabilitation Sciences, Katholieke Universiteit Leuven, Tervuursevest, Belgium
5. National Institute of Neurological Disorders and Stroke, Bethesda, Maryland
6. Edmond J. Safra Program in Parkinson’s Disease, Morton and Gloria Shulman Movement Disorders Clinic, Krembil Research Institute, Division of Neurology, Toronto Western Hospital, University of Toronto, Toronto, Ontario, Canada
7. Krembil Brain Institute, Toronto, Ontario, Canada
8. Donders Institute for Brain, Cognition and Behaviour, Department of Neurology, Radboud University Medical Centre, Nijmegen, the Netherlands