1. Institute of Metabolism and Systems Research, College of Medical and Dental Sciences, University of Birmingham , Birmingham B15 2TT , United Kingdom
2. Centre for Endocrinology, Diabetes and Metabolism, Birmingham Health Partners , Birmingham B15 2TT , United Kingdom
3. Department of Endocrinology, Queen Elizabeth Hospital, University Hospitals Birmingham NHS Foundation Trust , Birmingham B15 2GW United Kingdom
4. Department of Diabetes and Endocrinology, University Hospitals of Leicester NHS Trust, Leicester Royal Infirmary , Leicester LE1 5WW , United Kingdom
5. Oxford Centre for Diabetes, Endocrinology and Metabolism, Oxford University Hospitals NHS Foundation Trust , Oxford OX3 7LE , United Kingdom
6. Department of Endocrinology, Bristol Royal Infirmary, University Hospitals Bristol and Weston NHS Foundation Trust , Bristol BS2 8HW , United Kingdom