1. Population, Policy and Practice Research and Teaching DepartmentUCL Great Ormond Street Institute of Child Health, University College London London UK
2. Department of PaediatricsUniversity of Cambridge Cambridge UK
3. MRC Biostatistics UnitUniversity of Cambridge Cambridge UK
4. Wellcome Trust—MRC Institute of Metabolic SciencesUniversity of Cambridge Cambridge UK
5. Centre for Endocrinology, William Harvey Research InstituteQueen Mary University London UK
6. Department of Paediatric EndocrinologyBarts Health NHS Trust, Royal London Children's Hospital London UK
7. Department of Public Health and PolicyUniversity of Liverpool Liverpool UK
8. The Royal College of Paediatrics and Child Health London UK