1. Department of Paediatric Endocrinology, St George’s University Hospitals NHS Foundation Trust, London, UK
2. Department of Paediatric Endocrinology, University Hospital Southampton, NHS Foundation Trust, Hampshire, UK
3. Institute of Women's Health, University College London, London, UK
4. Department of Paediatric Endocrinology, Bristol Royal Hospital for Children, University Hospitals Bristol NHS Foundation Trust, Bristol, UK