1. Thyroid Research Group, Institute of Molecular and Experimental Medicine, Cardiff University School of Medicine, Cardiff, United Kingdom2Department of Social and Community Based Medicine, University of Bristol, Bristol, United Kingdom
2. Henry Wellcome Laboratories for Integrative Neurosciences and Endocrinology, University of Bristol, Bristol, United Kingdom
3. Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, United Kingdom
4. Department of Social and Community Based Medicine, University of Bristol, Bristol, United Kingdom
5. Thyroid Research Group, Institute of Molecular and Experimental Medicine, Cardiff University School of Medicine, Cardiff, United Kingdom
6. University Hospitals Bristol National Health Service Foundation Trust, Bristol, United Kingdom
7. University of Exeter Medical School, Exeter, United Kingdom
8. Department of Endocrinology and Diabetes, Sir Charles Gairdner Hospital, Nedlands, Australia
9. Thyroid Research Group, Institute of Molecular and Experimental Medicine, Cardiff University School of Medicine, Cardiff, United Kingdom3Henry Wellcome Laboratories for Integrative Neurosciences and Endocrinology, University of Bristol, Bristol, United Ki