1. Department of Metabolism & Experimental Therapeutics, Division of Medicine, UCL Medical School, University College London, Gower Street, London WC1E 6BT, UK
2. First Department of Propaedeutic and Internal Medicine, Laiko University Hospital, National and Kapodistrian University of Athens, Athens, Greece
3. Department of Diabetes & Endocrinology, University College London Hospitals NHS Foundation Trust, London, UK
4. Division of Medicine, University College London, London, UK
5. Centre for Neuroendocrinology, University College London, London, UK
6. Green Templeton College, University of Oxford, Oxford, UK
7. Neuroendocrine Tumour Unit, Royal Free Hospital, London, UK
8. Centre for Endocrinology, Barts and the London School of Medicine, Queen Mary University of London, London, UK