1. Department of Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom.
2. NIHR Bristol Biomedical Research Centre, University Hospitals Bristol and Weston NHS Foundation Trust and University of Bristol, Bristol, United Kingdom.
3. Autism Study Advisor, Bristol, United Kingdom.
4. Autistica UK Charity, London, United Kingdom.
5. Learning Disability and Autism Programme, NHS England & NHS Improvement, London, United Kingdom.
6. Avon and Wiltshire Partnership NHS Mental Health Trust, Bath, United Kingdom.