1. Department of Epidemiology & Biostatistics, Faculty of Medicine and Health Sciences, University of Auckland, Auckland, New Zealand
2. Department of Infectious & Tropical Diseases, International Centre for Eye Health, Clinical Research Unit, London School of Hygiene and Tropical Medicine, London, United Kingdom
3. The George Institute for Global Health, University of New South Wales, Sydney, Australia
4. International Centre for Evidence in Disability, Clinical Research Unit, Department of Infectious & Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom