1 Royal Manchester Children's Hospital, Central Manchester University Hospitals NHS Foundation Trust, Manchester, UK Research and Policy Division, Royal College of Paediatrics and Child Health, London, UK.
2 School of Social Science & Public Policy and Research Centre for Social Policy, Keele University, Keele, Staffordshire, UK Partners in Paediatrics, West Midlands, UK.
3 Partners in Paediatrics, West Midlands, UK Clinical Lead for Commissioning of Infants, Children and Young People's Services, Dudley Clinical Commissioning Group, Dudley, UK.