1 Early Start, Faculty of Social Sciences, University of Wollongong, Wollongong, NSW, Australia. Electronic address: tokely@uow.edu.au.
2 Children's Hospital of Eastern Ontario Research Institute, Ottawa, ON, Canada.
3 Physical Activity for Health Group, School of Psychological Sciences and Health, University of Strathclyde, Glasgow, Scotland.
4 MRC/Wits Developmental Pathways for Health Research Unit, University of the Witwatersrand, Johannesburg, South Africa; Division of Exercise Science and Sports Medicine, University of Cape Town, Cape Town, South Africa.
5 Surveillance & Population Based Prevention, Prevention of Non-Communicable Diseases, World Health Organization, Geneva, Switzerland.