1. Metabolic Neurology, Institute of Metabolism and Systems Research, College of Medical and Dental Sciences, University of Birmingham , Birmingham, UK
2. Department of Neurology, University Hospitals Birmingham NHS Foundation Trust, Queen Elizabeth Hospital , Birmingham, UK
3. Upper GI Unit and Minimally Invasive Unit, Birmingham Heartlands Hospital, University Hospitals Birmingham NHS Foundation Trust , Birmingham, UK
4. Medical School, University of Leeds , Leeds, UK
5. Oxford Centre for Diabetes, Endocrinology & Metabolism (OCDEM), NIHR Oxford Biomedical Research Centre, University of Oxford, Churchill Hospital , Headington, Oxford, UK
6. Department of Biosciences, Nottingham Trent University , Nottingham, UK
7. Birmingham Neuro-Ophthalmology, University Hospitals Birmingham NHS Foundation Trust, Queen Elizabeth Hospital , Birmingham, UK