1. Academic Endocrine Unit and
2. Division of Nephrology and CELL Unit, de Duve Institute, Université Catholique de Louvain Medical School, Brussels, Belgium
3. Institute of Membrane and Systems Biology, Faculty of Biological Sciences, University of Leeds, Leeds;
4. Diabetes Research Laboratories, Nuffield Department of Medicine, University of Oxford, Oxford Centre for Diabetes, Endocrinology, and Metabolism, Churchill Hospital, Oxford;
5. University Laboratory of Physiology, University of Oxford, Oxford, United Kingdom; and