1. Discipline of Public Health Medicine, School of Nursing and Public Health, University of KwaZulu-Natal, Durban, South Africa
2. Michael Chilufya Sata School of Medicine, Public Health Department, Copperbelt University, Ndola, Zambia
3. Cancer & Infectious Diseases Epidemiology Research Unit, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa