1. Reta Lila Weston Institute of Neurological Studies, Department of Clinical Movement Disorder and Neuroscience Institute of Neurology, University College London London United Kingdom
2. The National Hospital for Neurology and Neurosurgery London United Kingdom
3. Department of Neurology Bon Secours Hospital Cork Ireland
4. Department of Clinical Movement Disorder and Neuroscience Institute of Neurology, University College London London United Kingdom
5. Department of Neurology Innsbruck Medical University Innsbruck Austria