1. MRC/Wits Rural Public Health and Health Transitions Research Unit (Agincourt), School of Public Health, Faculty of Health Sciences, University of Witwatersrand , Johannesburg, South Africa
2. Department of Public Health, University of Oxford , Oxford, UK
3. Burden of Disease Research Unit, Medical Research Council of South Africa, Tygerberg , Western Cape, South Africa
4. Department of Medicine Health Sciences Faculty, Division of Endocrinology and Diabetes, University of Cape Town
5. Chronic Diseases Initiative in Africa , Cape Town, South Africa