Published on in Vol 5 , No 12 (2017) :December

1 Human Sciences Research Council , Pietermaritzburg , ZA
2 Medical Research Council / University of the Witwatersrand Developmental Pathways for Health Research Unit , Department of Paediatrics, Faculty of Health Science , University of the Witwatersrand , Johannesburg , ZA
3 PATH , Johannesburg , ZA
4 University of the Witwatersrand , Johannesburg , ZA
5 Assistive Technologies in Autism and Intellectual Disability , National University of Ireland , Galway , IE
6 Department of Science and Technology–National Research Foundation Centre of Excellence in Human Development , University of the Witwatersrand , Johannesburg , ZA
*all authors contributed equally