1 Counties Manukau Health, South Auckland, Auckland, New Zealand; Section of Epidemiology and Biostatistics, School of Population Health, Faculty of Medical and Health Sciences, University of Auckland, Auckland 1142, New Zealand; University College London, London, UK. Electronic address: s.ameratunga@auckland.ac.nz.
2 University of Western Cape-School of Public Health, Cape Town, South Africa; UN University, International Institute of Global Health, Kuala Lumpur, Malaysia; Johns Hopkins Bloomberg School of Public Health, Baltimore MD, USA.