1. Burden of Disease Research Unit, South African Medical Research Council, PO Box 19070, Tygerberg, 7505, Cape Town, South Africa.
2. Biostatistics Unit, South African Medical Research Council, Cape Town, South Africa.
3. Gender and Health Research Unit, South African Medical Research Council, Cape Town, South Africa.
4. Division of Forensic Medicine and Toxicology, University of Cape Town, Cape Town, South Africa.