1 GKT School of Medical Education, King's College London, London, UK.
2 Department of Children's Neuroscience, Evelina London Children's Hospital, Guys and St Thomas National Health Service Trust and South London and Maudsley National Health Service Trust, London, UK.
3 Neuro-Diverse.Org, Brussels, Belgium.
4 Evelina London Children's Hospital, Guy's and St Thomas Trust and King's College London, London, UK.
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 Clinical Neurosciences, University of Calgary, Calgary, Alberta, Canada.
7 Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada.
8 Department of Pediatrics, Copenhagen University Hospital-Herlev and Gentofte, Herlev, Denmark.
9 Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark.
10 Department of Psychiatry, Social Psychiatry and Psychotherapy, Hannover Medical School, Hannover, Germany.
11 Department of Neurology, Hôpital Fondation Rothschild, Paris, France.
12 Department of Bioethics, Medical University of Warsaw, Warsaw, Poland.
13 Department of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA.