1. Stellenbosch University Faculty of Medicine and Health Sciences, Department of Human Nutrition, Cape Town, South Africa

2. VU University Medical Center, Department of Pediatrics, Amsterdam UMC, Amsterdam, The Netherlands

3. Infection Control Africa Network - ICAN, Cape Town, South Africa

4. Stellenbosch University Faculty of Medicine and Health Sciences, Department of Paediatrics and Child Health, Cape Town, South Africa

5. Stellenbosch University Faculty of Medicine and Health Sciences, Department of Global Health, Division of Epidemiology and Biostatistics, Cape Town, South Africa