1. Department of Neurology Maastricht University Medical Center Maastricht The Netherlands
2. Department of Neurology Leiden University Medical Center Leiden The Netherlands
3. Department of Clinical Epidemiology and Medical Technology Assessment Maastricht University Medical Center Maastricht The Netherlands
4. Department of Clinical Genetics Leiden University Medical Center Leiden The Netherlands
5. Institut du Cerveau et de la Moelle épinière (ICM), AP‐HP, Inserm, CNRS, Sorbonne Université University Hospital Pitié‐Salpêtrière Paris France
6. Department of Neurodegenerative Disease, Huntington's Disease Centre, UCL Queen Square Institute of Neurology University College London London United Kingdom
7. Department of Clinical Genetics Maastricht University Medical Center Maastricht The Netherlands
8. GROW Research Institute for Oncology and Developmental Biology Maastricht University Maastricht The Netherlands