1. Child Health Department, Northumbria Healthcare NHS Foundation Trust, North Shields, UK
2. Institute of Health and Society, Newcastle University, Newcastle upon Tyne, UK
3. Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK
4. Great North Children’s Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
5. Complex Neurodevelopmental Disorders Service, Northumberland, Tyne and Wear NHS Foundation Trust, Newcastle upon Tyne, UK
6. Arthritis Research UK Centre for Epidemiology, Centre for Musculoskeletal Research, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
7. National Institute for Health Research (NIHR) Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, Manchester, UK
8. Council for Disabled Children, London, UK
9. Health Economics Group, Newcastle University, Newcastle upon Tyne, UK