1 Burden of Disease Research Unit, South African Medical Research Council, Cape Town, South Africa. pamela.groenewald@mrc.ac.za.
2 Burden of Disease Research Unit, South African Medical Research Council, Cape Town, South Africa; School of Public Health and Family Medicine, Faculty of Health Sciences, University of Cape Town, South Africa. richard.matzopoulos@mrc.ac.za.
3 Division of Forensic Medicine, Department of Pathology, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa. ebafonso@sun.ac.za.
4 Burden of Disease Research Unit, South African Medical Research Council, Cape Town, South Africa. debbie.bradshaw@mrc.ac.za.