1. Department of Neurology University Medical Center GroningenUniversity of Groningen Groningen The Netherlands
2. Expertise Center Movement Disorders Groningen University Medical Center Groningen Groningen The Netherlands
3. Department of Neurology Martini Hospital Groningen The Netherlands
4. Department of Epidemiology Medisch Spectrum Twente Hospital Enschede The Netherlands
5. Department of Neurology Catharina Hospital Eindhoven The Netherlands