1. Clinical Trial Service Unit and Epidemiological Studies Unit, Nuffield Department of Population Health University of Oxford Oxford UK
2. Medical Research Council Population Health Research Unit Nuffield Department of Population Health, University of Oxford Oxford UK
3. Oxford Centre for Diabetes, Endocrinology, and Metabolism University of Oxford Oxford UK
4. Oxford Biomedical Research Centre, National Institute for Health Research Oxford University Hospitals Foundation Trust Oxford UK
5. Cancer Epidemiology Unit University of Oxford Oxford UK