1. Endocrine Section, Department of Medical Biochemistry and Immunology, University Hospital of Wales
2. Department of Child Health, School of Medicine, Cardiff University, Cardiff
3. Department of Paediatrics, Royal Gwent Hospital, Newport
4. Department of Paediatrics, Nevill Hall Hospital, Abergavenny
5. Countess of Chester Hospital
6. Department of Child Health, Singleton Hospital, Swansea
7. Children's Centre, Royal Glamorgan Hospital, Llantrisant
8. Centre for Endocrine & Diabetes Sciences, Wales School of Medicine, Cardiff University
9. Department of Child Health
10. Newborn Screening Laboratory, Department of Medical Biochemistry and Immunology, University Hospital of Wales, Cardiff, UK