1. East London NHS Foundation Trust, Bedford, UK
2. University College London, London, UK
3. King’s College London, UK
4. Department of Pharmacology and Pharmacy, The University of Hong Kong, Hong Kong
5. Child and Adolescent Mental Health Services, East London NHS Foundation Trust, Dunstable, Bedfordshire, UK
6. St George’s Hospital Neurology, London, UK
7. Tourettes Action, Farnborough, Hampshire, UK