1. Department of Global Health and Development, London School of Hygiene & Tropical Medicine, London, UK
2. Saw Swee Hock School of Public Health, Tahir Foundation Building, National University of Singapore, Singapore, Singapore
3. Centre for Biomedical Ethics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
4. Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, UK