1. Epilepsy Specialist Service, Swansea Bay University Health Board, Cardiff, UK
2. Unit for Development in Intellectual and Developmental Disabilities, University of South Wales, Pontypridd, UK
3. Cornwall Intellectual Disability Equitable Research (CIDER), University of Plymouth Peninsula School of Medicine, Truro, UK
4. Adult Neurodevelopmental Psychiatry, Cornwall Partnership NHS Trust, Truro, UK
5. Department of Population Health Sciences, University of Leicester, Leicester, UK
6. Adult Learning Disability Service, Leicestershire Partnership NHS Trust, Leicester, UK
7. Clinical Genetics Department, University Hospitals of Leicester, Leicester, UK