C J H May1,2, M Asia1,2, N Karavitaki1,2,3, W Arlt1,2,3, P Guest4, M W O'Reilly1,2,3. 1. From the Endocrinology Department, University Hospitals Birmingham NHS Foundation Trust, Queen Elizabeth Hospital Birmingham, Birmingham B15 2TH, UK. 2. Centre for Endocrinology, Diabetes and Metabolism, Birmingham Health Partners Birmingham, Birmingham B15 2TH, UK. 3. Institute of Metabolism and Systems Research, University of Birmingham, Birmingham B15 2TT, UK. 4. Radiology Department, University Hospitals Birmingham NHS Foundation Trust, Queen Elizabeth Hospital Birmingham, Birmingham B15 2TH, UK.