1 Thyroid Research Group Institute of Molecular and Experimental Medicine, UHW, Cardiff University School of Medicine, C2 link corridor, Heath Park, Cardiff, UK. taylorpn@cardiff.ac.uk.
2 Department of Endocrinology, University Hospital of Wales, Cardiff, UK. taylorpn@cardiff.ac.uk.
3 Department of Endocrinology, University Hospital of Wales, Cardiff, UK.
4 Thyroid Research Group Institute of Molecular and Experimental Medicine, UHW, Cardiff University School of Medicine, C2 link corridor, Heath Park, Cardiff, UK.
5 Neuroscience and Mental Health Research Institute, Cardiff University School of Medicine, Cardiff, UK.
6 Diabetes Department, Prince Charles Hospital, Cwm Taf Morgannwg University Health Board, Merthyr Tydfil, UK.