1. Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore
2. Department of Global Health and Development, London School of Hygiene and Tropical Medicine, London, UK
3. Stanford Distinguished Careers Institute, Campus Drive, Stanford, CA, USA
4. Department of Community Health Sciences, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
5. Chelsea and Westminster Hospital NHS Foundation Trust, London, UK