1. Sobell Department of Motor Neuroscience and Movement Disorders; University College London (UCL) Institute of Neurology; London United Kingdom
2. Department of Neurology; University Medical Centre Hamburg-Eppendorf (UKE); Hamburg Germany
3. Department of Paediatric and Adult Movement Disorders and Neuropsychiatry, Institute of Neurogenetics; University of Lübeck; Lübeck Germany