1. Department of Endocrinology & Metabolism Newcastle‐Upon‐Tyne Hospitals NHS Foundation Trust, Royal Victoria Infirmary Newcastle Upon Tyne UK
2. Centre for Endocrinology, William Harvey Research Institute Queen Mary University of London London UK
3. Department of Paediatric Endocrinology, Royal London Children's Hospital Barts Health NHS Trust London UK
4. Department of Paediatric Endocrinology, Newcastle‐Upon‐Tyne Hospitals NHS Foundation Trust Great North Children's Hospital Newcastle Upon Tyne UK
5. Translational & Clinical Research Institute University of Newcastle‐Upon‐Tyne Newcastle Upon Tyne UK
6. Department of Metabolism, Digestion & Reproduction Imperial College London London UK
7. Northern Gender Dysphoria Service, Cumbria, Northumberland, Tyne & Wear NHS Foundation Trust Benfield House, Walkergate Park Hospital Newcastle Upon Tyne UK