1. Institute for Health and Society; Newcastle University; Newcastle Upon-Tyne UK
2. York Trials Unit; Department of Health Sciences; University of York; York UK
3. The Children's Sleep Charity; Balby, Doncaster UK
4. Sheffield Children's NHS Foundation Trust; Sheffield UK
5. Blackpool Teaching Hospitals NHS Foundation Trust; Blackpool UK
6. Centre for Reviews and Dissemination; University of York; York UK
7. Social Policy Research Unit; University of York; York UK