1. SAMRC/Wits Developmental Pathways for Health Research Unit, Faculty of Health Sciences University of the Witwatersrand Johannesburg South Africa
2. CNRS, UMR 7206 “Eco‐anthropologie”, Musée de l'Homme Museum National d'Histoire Naturelle Paris France
3. Division of Community Paediatrics, Department of Paediatrics and Child Health, Faculty of Health Sciences University of the Witwatersrand Johannesburg South Africa