1. 1Department of EndocrinologyCentral Manchester University Hospitals Foundation Trust, Manchester Royal Infirmary, Manchester, UK
2. 2Leeds General InfirmaryLeeds Teaching Hospitals NHS Trust, Blood Sciences, Leeds, UK
3. 3Department of EndocrinologyUniversity Hospitals of Leicester, Leicester Royal Infirmary, Leicester, UK
4. 4The Society for Endocrinology22 Apex Court, Woodlands, Bradley Stoke, Bristol, UK