1. Department of Clinical and Movement Neuroscience UCL Queen Square Institute of Neurology London United Kingdom
2. Evelina Children's Hospital Guy's and St Thomas' NHS Foundation Trust London United Kingdom
3. Advanced Pediatric Center Postgraduate Institute of Medical Education and Research Chandigarh India
4. Department of Neurology University of Rochester Rochester New York USA
5. Department of Clinical Neurosciences University of Calgary Calgary Alberta Canada
6. Department of Neurology, Salpêtrière Hospital Sorbonne University and Assistance Publique ‐ Hôpitaux de Paris Paris France
7. UCL Institute of Child Health London United Kingdom
8. Movement Disorders Unit, Department of Neurology Westmead Hospital Sydney New South Wales Australia
9. Sydney Medical School University of Sydney Sydney New South Wales Australia