1 Wolfson Institute of Population Health, Queen Mary University of London, London E1 2AT, UK. Electronic address: r.mathur@qmul.ac.uk.
2 Department of Non-communicable Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, UK; Department of Internal Medicine, Yale School of Medicine, New Haven, CT, USA.
3 Saw Swee Hock School of Public Health, National University of Singapore, Singapore.
4 Department of Non-communicable Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, UK; MRC/UVRI and LSHTM Uganda Research Unit, London School of Hygiene & Tropical Medicine, London, UK.
5 Medical Research Council Unit The Gambia at London School of Hygiene & Tropical Medicine, Fajara, The Gambia.
6 Department of Family Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
7 Research For Impact Singapore, University of Dundee, Dundee, UK.
8 Department of Non-communicable Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, UK.
9 Division of Population Health and Genomics, School of Medicine, University of Dundee, Dundee, UK.