1 School of Population Health, University of New South Wales, Sydney, NSW 2052, Australia; The George Institute for Global Health, Sydney, NSW, Australia; Hypertension in Africa Research Team, Potchefstroom, South Africa; SAMRC Research Unit for Hypertension and Cardiovascular Disease, Potchefstroom, South Africa; North-West University, Potchefstroom, South Africa. Electronic address: a.schutte@unsw.edu.au.
2 Hypertension in Africa Research Team, Potchefstroom, South Africa; SAMRC Research Unit for Hypertension and Cardiovascular Disease, Potchefstroom, South Africa; North-West University, Potchefstroom, South Africa.
3 SAMRC Developmental Pathways for Health Research Unit, Department of Paediatrics, University of the Witwatersrand, Johannesburg, South Africa.