1. School of International Development and Global Studies, Faculty of Social Sciences, University of Ottawa, Ottawa, Canada;
2. Warwick Centre for Applied Health Research and Delivery (WCAHRD), Division of Health Sciences, Warwick Medical School, University of Warwick, Coventry, United Kingdom;
3. Department of Epidemiology and Medical Statistics, Faculty of Public Health, College of Medicine, University of Ibadan, Ibadan, Nigeria;
4. Centre for Actuarial Research, (CARe), Faculty of Social Sciences, University of Cape Town, Cape Town, South Africa