1. Life Course Epidemiology and Biostatistics, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
2. Newcastle University and Department of Paediatric Endocrinology, Royal Victoria Infirmary, Newcastle-upon-Tyne, United Kingdom
3. Paediatric and Adolescent Endocrinology, University College London Hospitals NHS Foundation Trust and UCL Great Ormond Street Institute of Child Health, London, United Kingdom
4. National Newborn Blood Spot Screening Programme, Public Health England, London, United Kingdom
5. Department of Clinical Biochemistry, Manchester University NHS Foundation Trust, Manchester, United Kingdom
6. Centre for Primary Care and Public Health, Barts and the London School of Medicine and Dentistry, Queen Mary University London, United Kingdom