1. Institute of Metabolism and Systems Research, College of Medical and Dental Sciences, University of Birmingham B15 2TT, Birmingham, United Kingdom
2. Centre for Endocrinology, Diabetes and Metabolism, Birmingham Health Partners, Birmingham B15 2TH, United Kingdom
3. Department of Endocrinology, Queen Elizabeth Hospital, University Hospitals Birmingham NHS Foundation Trust, Birmingham B15 2TH, United Kingdom
4. Oxford Centre for Diabetes, Endocrinology and Metabolism, Churchill Hospital, Oxford OX3 7LE, United Kingdom
5. Department of Ear, Nose and Throat, Queen Elizabeth Hospital, University Hospitals Birmingham NHS Foundation Trust, Birmingham B15 2TH, United Kingdom
6. Department of Neuroradiology, John Radcliffe Hospital, Oxford OX3 9DU, United Kingdom
7. Department of Radiology, Queen Elizabeth Hospital, University Hospitals Birmingham NHS Foundation Trust, Birmingham B15 2TH, United Kingdom
8. Department of Neurosurgery, John Radcliffe Hospital, Oxford OX3 9DU, United Kingdom
9. Department of Neurosurgery, Queen Elizabeth Hospital, University Hospitals Birmingham NHS Foundation Trust, Birmingham B15 2TH, United Kingdom