1. Clinical Trial Service Unit and Epidemiological Studies Unit (CTSU), Nuffield Department of Population Health, University of Oxford, Oxford, UK
2. Medical Research Council Epidemiology Unit, School of Clinical Medicine, University of Cambridge, Cambridge, UK
3. Leicester Diabetes Centre, College of Life Sciences, University of Leicester, Leicester, UK
4. Department of Primary Care and Population Health, University of Southampton, Southampton, UK
5. Department of Social and Behavioral Sciences, Harvard T.H. Chan School of Public Health, Harvard University, Boston, MA, USA
6. Department of Epidemiology and Public Health, Institute of Health Equity, University College London, London, UK