1. Department of Paediatrics & Child Health, Faculty of Medicine & Health Sciences, Stellenbosch University, Worcester
2. Centre for Infectious Disease Epidemiology and Research, School of Public Health, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
3. Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
4. Health Intelligence Directorate, Western Cape Government Health and Wellness, Cape Town, South Africa
5. Department of Biostatistics, Harvard T.H. Chan School of Public Health, Harvard University, Boston, Massachusetts, USA
6. Department of Obstetrics & Gynaecology, Faculty of Medicine & Health Sciences, Stellenbosch University, Cape Town, South Africa
7. ICAP at Columbia and Department of Epidemiology, Mailman School of Public Health, Columbia University, and Department of Pediatrics, Vagelos College of Physicians & Surgeons, Columbia University, New York, USA
8. Family Centre for Research with Ubuntu, Department of Paediatrics & Child Health, Faculty of Medicine & Health Sciences, Stellenbosch University
9. Division of Epidemiology and Biostatistics, School of Public Health, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.