1. Department of Archaeology, Biological Anthropology, University of Cambridge, Cambridge, UK
2. SAMRC/Wits Developmental Pathways for Health Research Unit, Department of Paediatrics and Child Health, School of Clinical Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
3. DSI-NRF Centre of Excellence in Human Development, University of the Witwatersrand, Johannesburg, South Africa