1. School of Public Health, Faculty of Medicine and Health, The University of Sydney , Sydney, NSW 2006, Australia
2. Department of Global Public Health and Bioethics, Julius Centre for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University , Utrecht 3508 GA, The Netherlands
3. Luxembourg Operational Research and Epidemiology Support Unit, Médecins Sans Frontières , Luxembourg City L-1617, Luxembourg
4. Division of Epidemiology and Biostatistics, School of Public Health, Faculty of Health Sciences, University of the Witwatersrand , Johannesburg 2193, South Africa
5. York Law School, University of York , York YO10 5GD, United Kingdom