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.