1. Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, USA
2. Oxford Centre for Diabetes, Endocrinology and Metabolism, Radcliffe Department of Medicine, University of Oxford, Churchill Hospital, Oxford OX3 7LJ, UK
3. Laboratory of Cardiac Energetics, National Heart Lung Blood Institute, Bethesda, MD, USA
4. Baker IDI Heart and Diabetes Institute, Melbourne, Australia
5. Oxford Parkinson's Disease Centre, University of Oxford, Oxford, UK
6. Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, UK
7. Neuroimaging Centre, Division of Neuroscience, University Medical Center Groningen, Groningen, The Netherlands
8. Department of Radiology, Academic Medical Center Amsterdam, University of Amsterdam, Amsterdam, The Netherlands