1. 1Norfolk and Norwich University HospitalColney Lane, Norwich, UK
2. 2Centre for EndocrinologyDiabetes and Metabolism, University Hospitals Birmingham & University of Birmingham, Birmingham Health Partners, Birmingham, UK
3. 3Department of MedicineManchester Royal Infirmary, Manchester, UK
4. 4The Society for Endocrinology22 Apex Court, Woodlands, Bradley Stoke, Bristol, UK