1. School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, Durban, South Africa
2. National Health Laboratory Service, Durban, South Africa
3. Sequencing Core Facility, National Institute for Communicable Diseases, National Health Laboratory Service, Johannesburg, South Africa
4. Centre for the AIDS Programme of Research in South Africa, Durban, South Africa
5. School of Nursing and Public Health, Discipline of Public Health Medicine, University of KwaZulu-Natal, Durban, South Africa
6. National Health Laboratory Service, Johannesburg, South Africa