1. Cancer Epidemiology, Population and Global Health, King's College London, London, United Kingdom
2. Public Health Epidemiology, Nuffield Department of Primary Health Care Research and New College, University of Oxford, Oxford, United Kingdom
3. Centre for Evidence-Based Medicine, Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, United Kingdom
4. Institute of Cancer Policy, Kings Health Partners Comprehensive Cancer Centre, King's College London, London, United Kingdom