1. Department of Public Health, Environments and Society, Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, UK
2. Laboratory of Data Discovery for Health (D24H), Hong Kong Science Park, Hong Kong, China
3. Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK
4. Office of Graduate Education, University of North Carolina School of Medicine, Chapel Hill, NC, USA