1. Italian Cooperation, Pietermaritzburg, KwaZulu-Natal, South Africa
2. Italian Cooperation, Rome, Italy
3. Instituto Superiore di Sanita, Rome, Italy
4. Italian Cooperation, Pietermaritzburg, KwaZulu-Natal, South Africa; Instituto Superiore di Sanita, Rome, Italy; Philanjalo, Tugela Ferry, KwaZulu-Natal, South Africa
5. Philanjalo, Tugela Ferry, KwaZulu-Natal, South Africa
6. Umzinyathi Department of Health, Dundee, KwaZulu-Natal, South Africa
7. KwaZulu-Natal Department of Health, Pietermaritzburg, KwaZulu-Natal, South Africa
8. Departments of Internal Medicine, and Epidemiology and Public Health, Yale University School of Medicine, New Haven, Connecticut, USA
9. Divisions of General Internal Medicine, Infectious Diseases, and Epidemiology, Albert Einstein College of Medicine and Montefiore Medical Center, Bronx, New York, USA