1. Department of Clinical and Movement Neurosciences UCL Queen Square Institute of Neurology, University College London London United Kingdom
2. Department of Neuromuscular Diseases UCL Queen Square Institute of Neurology London United Kingdom
3. William Harvey Research Institute, School of Medicine and Dentistry, Queen Mary University of London London United Kingdom
4. Mass‐Spectrometry Science Technology Platforms, University College London London United Kingdom
5. Ken and Ruth Davee Department of Neurology and Simpson Querrey Center for Neurogenetics Northwestern University, Feinberg School of Medicine Chicago Illinois USA
6. Department of Neurosciences, Biomedicine and Movement Sciences University of Verona Verona Italy
7. Paediatric Neurology Oxford University Hospitals NHS Foundation Trust Oxford United Kingdom
8. Nuffield Department of Clinical Neurosciences University of Oxford Oxford United Kingdom
9. Oxford Centre for Genomic Medicine Oxford University Hospitals National Health Service Foundation Trust Oxford United Kingdom
10. Institute of Medical Genetics and Applied Genomics, University of Tübingen Tübingen Germany