1. Department of Internal Medicine, Federal University of Minas Gerais, Brazil
2. Department of Endocrinology, Queen Mary University of London, UK
3. Department of Surgery, Federal University of Minas Gerais, Brazil
4. Department of Physiology and Biophysics, Federal University of Minas Gerais, Brazil
5. Oxford Centre for Diabetes, Endocrinology and Metabolism, University of Oxford, UK