1. Department of Neurology King's College Hospital NHS Foundation Trust London United Kingdom
2. Rockefeller Neuroscience Institute, Department of Neurology West Virginia University Morgantown West Virginia USA
3. Department of Medicine University of Toronto, UHN and UHN Foundation Toronto Ontario Canada
4. Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Division of Neurology University of Cincinnati College of Medicine Cincinnati Ohio USA
5. Centre de Référence National Maladie Rare ‘Syndrome Gilles de la Tourette’, DMU Neurosciences AP‐HP, Sorbonne Université, Groupe Hospitalier Pitié‐Salpêtrière Paris France
6. Department of Women and Children's Health Evelina London Children's Hospital, Paediatric Neurosciences, GSTT and Kings College London, Faculty of Life Sciences and Medicine London United Kingdom
7. Department of Neurology Vanderbilt University Medical Center Nashville Tennessee USA
8. Department of Pediatrics Monroe Carell Jr. Children's Hospital at Vanderbilt Nashville Tennessee USA
9. Department of Neurology, Norman Fixel Institute for Neurological Diseases University of Florida Health Gainesville Florida USA
10. Department of Neurology Wake Forest University School of Medicine Winston Salem North Carolina USA
11. Division of Neurology Moncton Interdisciplinary Neurodegenerative Diseases Clinic, Horizon Health Network Fredericton New Brunswick Canada
12. Department of Psychiatry, Social Psychiatry and Psychotherapy Hannover Medical School Hannover Germany
13. Division of Pediatric Neurology and Developmental Neuroscience Pediatric Movement Disorders Clinic, Baylor College of Medicine Houston Texas USA
14. Department of Neurology, Weill Cornell Medicine Parkinson's Disease and Movement Disorders Institute New York New York USA
15. Department of Neurology 5th Regional Hospital Sosnowiec Poland
16. Department of Clinical Neurosciences University of Calgary Calgary Alberta Canada
17. Department of Bioethics Medical University of Warsaw Warsaw Poland
18. Department of Neurology, Harvard Medical School Tic Disorders and Tourette Syndrome Program, Boston Children's Hospital Boston Massachusetts USA
19. Department of Clinical Neurophysiology Sorbonne University, Paris Brain Institute ‐ ICM, INserm CNRS and Saint‐Antoine Hospital Paris France
20. Department of Clinical Neurosciences, Psychiatry, Pediatrics and Community Health Sciences University of Calgary Calgary Alberta Canada
21. Department of Clinical Neurosciences, Hotchkiss Brain Institute and Alberta Children's Hospital Research Institute University of Calgary Calgary Alberta Canada